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Diagnosis and treatment of constipation in children.

This review highlights the most significant progress in treatment of constipation occurring in the last year, underlying the advances in pathophysiology, clinical presentation, diagnosis, and treatment of both organic and functional constipation. Recent developments in the field of the pathophysiology of idiopathic chronic constipation and Hirschsprung's disease are discussed. Furthermore, a description of the new methods, which may have considerable diagnostic potential in children with functional and organic constipation, is presented. Finally, the recent therapeutic approaches to pediatric constipation and fecal incontinence are illustrated.

Child↗

Abnormalities of upper gut motility in patients with slow-transit constipation.

OBJECTIVE: To further delineate motor activity of the upper gastrointestinal tract in patients with slow-transit constipation. DESIGN: A prospective study comparing healthy volunteers with patients with a clinical diagnosis of slow-transit constipation. METHODS: Eighteen patients with clinical diagnosis of slow-transit constipation and 10 healthy controls were included in the study. Fasting antroduodenal motility was measured by perfusion manometry for at least one complete cycle of the migrating motor complex or a maximum of 300 min. Oesophageal manometry, gastric emptying and orocaecal transit time measurements were also performed. RESULTS: At least one complete cycle of the migrating motor complex was observed in all controls, but in only nine patients (P < 0.01 versus control). The migrating motor complex cycle was incomplete (n = 5) or phase 3 activity was absent (n = 4) in the other patients. The incidence of clustered contractions was significantly increased in slow-transit constipation (P = 0.05 versus controls). The area under the contraction curve during late phase 2 (1509+/-296 mmHg x s) in patients with a complete cycle was significantly smaller than that in controls (2997+/-614 mmHg x s; P = 0.05). Orocaecal transit time was not significantly different among patients and controls, but oesophageal motility was abnormal in five of 18 patients and gastric emptying was abnormal in eight of 15 patients. CONCLUSION: Abnormalities of upper gut motility occur frequently in patients with slow-transit constipation. Interdigestive antroduodenal motility is characterized by (i) absence or prolonged duration of the migrating motor complex, (ii) an increased number of clustered contractions, or (iii) a decreased motility during late phase 2 of the migrating motor complex.

Adult↗

Dysplasia of the submucous nerve plexus in slow-transit constipation of adults.

AIM: A clinicopathological entity, intestinal neuronal dysplasia type B (IND) has been described in children with severe constipation. The present study was designed to evaluate whether IND could be identified in adult patients with idiopathic slow-transit constipation. METHODS: Rectal biopsies were taken from 27 constipated patients with documented slow colonic transit and 23 controls and stained for S100 protein, acetylcholine esterase and lactate dehydrogenase. The mean and maximal number of ganglion cells per ganglion, mean number of ganglia and mean number of ganglion cells per mm2 of submucosal tissue, mean and maximal diameter of ganglion cells, maximal thickness of submucosal nerve fibres, and number of S100-positive cells per mm2 mucosal tissue were quantified. The density of submucosal ganglia, presence of heterotopic ganglion cells, intensity of staining of the adventitial layer of submucosal arteries, and density of nerve fibres in submucosa and lamina propria were evaluated qualitatively. In addition, subjective evaluation by an experienced pathologist was performed. RESULTS: There were no major differences between patients and controls, except that patients had slightly thicker submucosal nerves than controls (30.8 +/- 1.6 versus 25.5 +/- 2.0 microm, P < 0.05) and more frequent heterotopic ganglion cells (32 versus 6%, P < 0.05). Neither discriminant analysis of the morphometric data nor subjective evaluation was able to correctly classify the slides as originating from patients or controls. CONCLUSIONS: The existence of the clinicopathological entity IND in adults with slow-transit constipation is unlikely. For further classification of slow-transit constipation, rectal biopsies do not appear to be useful at present.

Adolescent↗

Rectal hyposensitivity: prevalence and clinical impact in patients with intractable constipation and fecal incontinence.

PURPOSE: Blunted rectal sensation, or rectal hyposensitivity, has been reported anecdotally in patients with functional disorders of evacuation and continence. The purpose of this study was to determine the prevalence of rectal hyposensitivity and whether the finding of such an abnormality was associated with any clinical impact. METHODS: One thousand three hundred fifty-one patients, referred for anorectal physiologic investigation, were divided according to presenting symptoms into the following categories: constipation (subdivided into infrequency of and/or obstructed defecation), fecal incontinence (subdivided into passive, postdefecation, and urge incontinence), fecal incontinence and constipation, or "other." Rectal hyposensitivity was judged to be present when at least one of the sensory threshold volumes was elevated beyond the normal range (mean plus 2 standard deviations). The prevalence of rectal hyposensitivity was then calculated in each group and in relation to other investigations. RESULTS: Rectal hyposensitivity was present in 16 percent of patients, with males and females equally affected. Twenty-three percent of patients with constipation, 10 percent of patients with fecal incontinence, 27 percent of patients with incontinence associated with constipation, and only 5 percent of patients with other symptoms were found to have rectal hyposensitivity. In patients with obstructed defecation, rectal hyposensitivity was present in 33 percent with rectocele, 40 percent with intussusception, and 53 percent with no mechanical obstruction evident on evacuation proctography. CONCLUSION: Rectal hyposensitivity is common in patients with constipation and/or fecal incontinence and may thus be important in the etiology of such conditions. Although the clinical relevance of this physiologic abnormality is unknown, its presence may have implications regarding the management of hindgut dysfunction and particularly the selection of patients for surgery.

Adolescent↗

The diameter of the rectum on ultrasonography as a diagnostic tool for constipation in children with dysfunctional voiding.

PURPOSE: We proved the accuracy of the transverse diameter of the rectum on ultrasonography as an additional parameter for diagnosing constipation in children with lower urinary tract dysfunction. MATERIALS AND METHODS: The diameter of the rectum on bladder ultrasonography in a constipated group of patients with dysfunctional voiding was compared to this diameter in a control group of patients with a normal defecation pattern. A total of 49 children were included. Group 1 consisted of 23 patients with a positive history of dysfunctional voiding and, according to pediatric gastroenterological practice, constipation. Control group 2 consisted of 26 patients without lower urinary tract dysfunction and a normal defecation pattern. In each group a defecation questionnaire was administered and physical examination of the abdomen was done. In all patients a 7.5 MHz probe was used to measure the transverse diameter of the rectum behind the bladder on ultrasonography. The probe was applied on the abdominal skin approximately 2 cm above the symphysis. Measurement was performed with a filled bladder at an angle of about 15 degrees downward from the transverse plane. RESULTS: In constipated group 1 the mean diameter of the rectum was 4.9 cm (95% CI 4.4 to 5.3). In the control group the mean diameter of the rectum was 2.1 cm (95% CI 1.8 to 2.4). In group 1 the diameter of the rectum was significantly larger than in group 2 (p < 0.001). None of the patients had a sensation to defecate during the investigation. There was no significant difference in age between the 2 groups (p = 0.20) and no significant difference between them in the period between the last time that stool was passed prior to the time of rectal measurement (p = 0.16). CONCLUSIONS: The transverse diameter of the rectum measured by lower abdominal ultrasound provides an additional accurate parameter with which to diagnose constipation in patients with nonneurogenic bladder-sphincter dyssynergia.

Adolescent↗

Comorbidities associated with constipation in children referred for colon manometry may mask functional diagnoses.

BACKGROUND: In children with prolonged constipation of unclear pathogenesis or unresponsive to treatment, colon manometry can discriminate between functional fecal retention (FFR) and colon neuromuscular diseases. AIM: To identify the clinical features precipitating referral for colon manometry in children with functional constipation. METHOD: Retrospective medical record review of 173 constipated children (116 male, mean age 6.9 years, range 1-17 years) referred for colon manometry. RESULTS: Manometry was normal in 121 (70%). In those with normal manometry, FFR was identified in 96, irritable bowel syndrome (IBS) in 10, and functional constipation in 15. Of the 96 children FFR, 72 (76%) had comorbid conditions that might have interfered with the clinician's ability to diagnose FFR. Of 52 children with colon neuromuscular disease, only 12 (23%) had comorbid conditions (P < 0.001 compared with FFR). Of children more than 4 years, those with FFR were more likely to have fecal incontinence (44 of 62; 71%) than those with other functional disorders (2 of 19; 10%; P < 0.001) or neuromuscular disease (6 of 23; 26%; P < 0.001). CONCLUSIONS: Two thirds of children referred for colon manometry had normal studies and met criteria for a functional diagnosis. Three quarters of those with functional constipation had a comorbid condition that might alter the history sufficiently to obscure the diagnosis.

Adolescent↗

Functional fecal soiling without constipation, organic cause or neuropsychiatric disorders?

BACKGROUND: The aetiology of fecal incontinence in children has traditionally been attributed to idiopathic constipation, structural defects or neuropsychiatric disorders. We describe a new subgroup of otherwise healthy children who have fecal soiling without any underlying cause for the incontinence. METHODS: The hospital records of children with fecal incontinence were screened to detect patients without any history, signs or symptoms of constipation or an organic, neurological or psychiatric cause for the incontinence. Anorectal manometry findings were compared with those of age-matched children with idiopathic constipation and soiling. RESULTS: Eight boys and 5 girls were identified. The median age at diagnosis was 7.9 years. Soiling had lasted median of 4.1 years, occurred at least every other day in 9, at least once a week in 2 and occasionally in 2 and required change of underwear or use of protective pads. Abdominal x-ray and barium enema showed normal findings. Sacral x-ray and/or MRI of the spinal cord showed normal bony spine and spinal cord. Five children had coexisting night and/or daytime wetting. Impaired rectal sensation was the only identifiable abnormality that was detected. The median volume required for the first sensation was 45 mL (range, 15-100 mL; normal, <15 mL). Anorectal manometry alone was unable to differentiate patients with functional fecal soiling from those with idiopathic constipation associated soiling. The median follow-up time after the diagnosis was 9.1 months. Treatment of fecal soiling consisted of education, dietary modification or stimulatory laxatives to establish regular toileting routines. Treatment improved fecal continence in 6 out of 8 cases with follow-up longer than 6 months. CONCLUSIONS: There is a small subgroup of children with fecal soiling who are otherwise healthy without constipation or any other underlying cause for the incontinence. These children seem to have isolated impairment of rectal sensation. In most, the prognosis is good with conservative treatment.

Adolescent↗

Effects of psyllium therapy on stool characteristics, colon transit and anorectal function in chronic idiopathic constipation.

BACKGROUND: Psyllium is widely used in the symptomatic therapy of constipation. Its effects on colonic function and their correlation with symptomatic response have not been defined. METHODS: After a 4-week baseline, placebo, run-in phase, 22 subjects with idiopathic constipation confirmed by prospectively administered stool diaries were randomly assigned to receive either psyllium (5 g b.d., 11 patients) or placebo (11 patients) for 8 weeks, followed by another 4-week wash-out, placebo phase. A colon transit study and anorectal manometry were performed at the beginning and at the end of each study phase. Subjects recorded, in diaries, their daily stool frequency, difficulty with defecation and weekly stool weight. RESULTS: Stool frequency increased significantly after 8 weeks of psyllium treatment (3.8 +/- 0.4 vs. 2.9 +/- 0.1 stools/week, P < 0.05) as did stool weight (665.3 +/- 95.8 g vs. 405.2 +/- 75.9 g, P < 0.05). Subjects also reported an improvement in stool consistency (stool consistency score: 3.2 +/- 0.2 vs. 3.8 +/- 0.2, P < 0.05) and pain on defecation (pain score: 2.0 +/- 0.4 vs. 2.6 +/- 0.5, P < 0.05) on psyllium. Colon transit and anorectal manometry parameters were unchanged on psyllium. Subjects treated with placebo did not show any change in either subjective or objective measures of constipation. CONCLUSIONS: Psyllium increases stool frequency and weight and improves stool consistency in idiopathic constipation. These effects are not associated with significant changes in either colonic or rectal motor function. We suggest that the beneficial effects of psyllium in constipation are primarily related to a facilitation of the defecatory process.

Adult↗

Effects of long-term treatment with oxytocin in chronic constipation; a double blind, placebo-controlled pilot trial.

BACKGROUND: Oxytocin and its receptor have been found throughout the gastrointestinal (GI) tract, where it affects gut function. Clinically, we have noticed an improvement of bowel habits during lactation in constipated women. The aim of this study was to examine whether oxytocin has an effect on bowel symptoms and psychological well being in women with refractory constipation. METHODS: Fifty-nine women with refractory constipation were included in a double blind, multicentre study. After a 2-week run-in period, they were randomly allocated to nasal inhalation of either placebo or oxytocin treatment twice daily for 13 weeks, followed by a 2 weeks, posttreatment period. The patients completed a questionnaire every day concerning bowel habits, abdominal pain and discomfort, and Gastrointestinal Symptoms Rating Scale (GSRS) and Psychological General Well-being (PGWB) twice during the study; namely, during the baseline period and at the end of the treatment period. RESULTS: Both oxytocin and placebo led to improvement of the constipation according to the GSRS and led to improvement in the sensation of incomplete evacuation and anorectal obstruction, without significant differences between the groups. Abdominal pain and discomfort responded weakly to oxytocin, with no effect of the placebo. In a subgroup of patients with IBS and concomitant depression, a weak improvement in depressed mood was observed after oxytocin administartion. CONCLUSION: Nasal administration of oxytocin had no significant advantage over placebo concerning an effect on constipation. However, it seems to have a positive effect on abdominal pain and discomfort and depressed mood. These findings should be further explored.

Adult↗

Partial sacral agenesis with constipation: a report of one family.

Seven first degree relatives in three generations of a family with partial sacral agenesis are reported. Anterior sacral meningoceles were found in five cases, four of whom had severe constipation, one with urinary voiding dysfunction, and another without constipation who had low pressure headaches and dyspareunia. The anomalad was transmitted in an autosomal dominant fashion with incomplete penetrance and variable expression. This entity should be considered in all children and adults with severe constipation from birth, a family history of constipation and/or where constipation is refractory to medical therapy.

Abnormalities, Multiple↗

Paediatric constipation for adult surgeons--article 1: targeting the cause.

Constipation is very common in all age groups and can be resistant to standard therapies, producing chronic morbidity. Childhood onset constipation frequently produces symptoms that persist into adulthood. Recent advances have been made in the diagnosis and treatment of childhood constipation that could have application in adult practice. In the first part of the present review, the methods of differentiation of patients with a disorder of colonic motility from those with an anorectal hold-up are discussed. Slow transit constipation, with distinct features on colonic manometry and scintigraphy, has only recently been recognized in children. This diagnosis, together with a novel method of placement of a manometric catheter, is described. While the cause of slow transit constipation remains unclear, clinical features that differ between children and adults may provide an insight into the aetiology. The diagnosis of intestinal neuronal dysplasia is explained and the controversy surrounding the diagnosis outlined. We propose that the traditional histological criteria exclude many other clinically significant forms of dysplasia of the enteric nervous system and should be extended.

Adolescent↗

Ileostomy for constipation: long-term postoperative outcome.

BACKGROUND AND AIMS: Idiopathic constipation is a rare indication for ileostomy construction. The aim of the study was to evaluate the success of ileostomy in treatment of severe constipation. Also to analyse the surgical complications and re-operation rate to identify any factors potentially predictive of outcome. PATIENTS AND METHODS: This retrospective study analysed the long-term outcome of 24 ileostomies constructed for constipation. The ileostomy construction was performed in 13 patients during large bowel/rectum resection, in 6 after a full laparotomy and in 5 through an abdominal wall trephine alone. We analysed the surgical complications and the re-operation rate according any factors potentially predictive of outcome. RESULTS: One (4%) patient had persistent constipation after stoma creation. Surgical complications occurred in 11 (46%): retraction in 6 (25.0%), peristomal sepsis in 3 (12.5%) and parastomal hernia in 2 (8.1%). Refashioning of the stoma was necessary in 7 (29%) patients. Previous abdominal surgery, end ileostomy, ileostomy constructed after large bowel resection or laparotomy were associated with a significantly higher incidence of stomal complications while age, duration of follow up, major complication and ileostomy created after bowel resection were associated to a significantly higher re-operation rate (P < 0.05). Multivariate analysis identified end ileostomy and ileostomy created after bowel resection as independent risk factors for surgical complication and re-operation, respectively (P < 0.05). CONCLUSIONS: Ileostomies were associated with a high frequency of complications, but most could be managed by minor surgical interventions. Patients who are considered for an ileostomy for severe idiopathic constipation should, where possible, have a loop ileostomy through a trephine rather than a laparotomy.

Adult↗

Sacral nerve stimulation induces pan-colonic propagating pressure waves and increases defecation frequency in patients with slow-transit constipation.

OBJECTIVE: Colonic propagating sequences are important for normal colonic transit and defecation. The frequency of these motor patterns is reduced in slow-transit constipation. Sacral nerve stimulation (SNS) is a useful treatment for fecal and urinary incontinence. A high proportion of these patients have also reported altered bowel function. The effects of SNS on colonic propagating sequences in constipation are unknown. Our aims were to evaluate the effect of SNS on colonic pressure patterns and evaluate its therapeutic potential in severe constipation. METHOD: In eight patients with scintigraphically confirmed slow-transit constipation, a manometry catheter (16 recording sites at 7.5 cm intervals) was positioned colonoscopically and the tip fixed in the caecum. Temporary electrodes (Medtronic) were implanted in the S2 and S3 sacral nerve foramina under general anaesthesia. In the fasted state, 14 Hz stimulation was administered and four sets of parameters (pulse width 300 or 400 micros; S2 and S3) were tested in four 2-h epochs, in random order, over 2 days. Patients were then discharged home with the sacral wires in situ and a 3-week trial stimulation commenced during which patients completed a daily stool diary. RESULTS: When compared with basal activity, electrical stimulation to S3 significantly increased pan-colonic antegrade propagating sequence (PS) frequency (5.4 +/- 4.2 vs 11.3 +/- 6.6 PS/h; P=0.01). Stimulation at S2 significantly increased retrograde PSs (basal 2.6 +/- 1.8 vs SNS 5.6 +/- 4.8 PS/h; P=0.03). During the subsequent three-week trial (continuous stimulation), six of eight reported increased bowel frequency with a reduction in laxative usage. CONCLUSION: These data demonstrate that SNS induces pan-colonic propagating pressure waves and therefore shows promise as a potential therapy for severe refractory constipation.

Adult↗

Constipation in epidermolysis bullosa: successful treatment with a liquid fiber-containing formula.

In epidermolysis bullosa (EB), chronic constipation, painful defecation, and fecal impaction frequently contribute to malnutrition and growth failure. Standard treatments for constipation, such as increased intake of conventional dietary fiber and fluids and/or the use of laxatives and stool softeners, are largely unsuccessful. We evaluated by questionnaire the use of a fiber-containing liquid formula (Enrich) in 20 chronically constipated children with dystrophic EB. All derived substantial improvement in constipation when taking 250 to 750 ml Enrich per day. We recommend that such a fiber-containing food be prescribed for chronic constipation in EB. In cases of fecal impaction, this should be preceded by bowel cleansing.

Adolescent↗

Insights into the pathophysiology and mechanisms of constipation, irritable bowel syndrome, and diverticulosis in older people.

OBJECTIVES: To review the epidemiology, pathophysiology and mechanisms of irritable bowel syndrome (IBS), constipation, and diverticulosis, for the purpose of addressing these three common conditions in older adults (>65 years of age). DESIGN: Using a MEDLINE search, we identified original English language journal articles and reviews from 1965 to December 1998. We also selected articles published before 1965 or after 1998 that were cross-referenced or pertinent to the topics researched. RESULTS: The prevalence of constipation and diverticulosis is higher in older than in younger adults. Significant risk factors for constipation in older women are failure of the anorectal angle to open or excessive perineal descent, which represent disturbances of pelvic floor function and rectal evacuation. In contrast, the prevalence of IBS is no greater than in younger adults. Nevertheless, these syndromes impact on the patient's functional status and quality of life. The mechanisms resulting in these gastrointestinal syndromes are unclear. Uncoordinated colonic activity and colonic segmentation may lead to IBS and diverticulosis, respectively, and these pathophysiological findings suggest disorders of inhibitory control of neuromuscular function. The total number of neurons in the myenteric plexus is decreased, and collagen deposited in the distal colon is increased with aging in humans. Animal studies suggest that senescent colonic muscle responds less to excitatory factors in vitro, and neural injury in older animals may result from apoptosis, defects of mitochondrial metabolism, and inadequate levels or response to neurotrophins. Future investigations will reveal whether similar mechanisms underlie human disease. Currently, treatment is aimed at relief of symptoms of IBS or constipation or dealing with the complications of diverticulosis. CONCLUSIONS: Constipation, IBS, and diverticulosis are common problems of aging. There is a need for further systematic research of the basic mechanisms in neuromuscular dysfunction with aging, including the studies of physical characteristics of the colonic wall, pelvic floor function (particularly in women with excessive perineal descent), and neurohormonal control of motility and sensation. Insights on the pathophysiology and mechanisms of neural injury may lead to more specific treatments in the future, e.g., serotonergic agents and neurotrophins. Meanwhile, collaborations between primary care physicians, geriatricians, and gastroenterologists can optimize management of these three common conditions that significantly impact the quality of life of older adults.

Age Distribution↗

Challenging problems presenting as constipation.

Patients who seek medical care for constipation present challenges which may involve communication problems, difficulties in diagnosis, lack of optimal therapy, uncorrectable underlying disorders, or psychiatric issues which complicated management. This review describes some of these challenges, and presents management approaches that may increase the likelihood of satisfactory treatment outcomes. Situations which are reviewed include the diagnostic evaluation of the new patient with constipation; syndromes of uncertain pathophysiology including irritable bowel syndrome, slow transit constipation, and pelvic floor dysfunction; constipation associated with neurologic disorders including spinal cord injury, Parkinson's disease, and multiple sclerosis; and psychiatric issues which complicate the management of constipation, including recognition of associated psychiatric diseases, unusual attitudes toward bowel function, eating disorders, and referral for psychiatric care.

Constipation↗

Physiology of refractory chronic constipation.

OBJECTIVE: Investigators suggest three distinct pathophysiologies for patients with constipation symptoms: 1) slow colon transit, 2) irritable bowel syndrome (IBS), and 3) pelvic floor dysfunction (PFD). Our aim was to determine the prevalence of the three types of constipation pathophysiology, the degree of overlap, and what interactions exist between pathophysiologies. METHODS: Constipated patients refractory to fiber (n = 131) underwent regional colon transit studies, anorectal manometry/EMG, measurement of rectal compliance, and rectal sensory testing. Correlations were performed examining interactions between the above measures. RESULTS: Visceral hypersensitivity (typical of IBS) was found in 58%, slow colonic transit in 47%, PFD in 59%, and no physiological abnormalities were detected in 24%. Slow transit and visceral hypersensitivity overlapped in half of each group. PFD physiology was found in approximately half of each of the subgroups. There was no correlation between PFD physiology and rectosigmoid transit, total colon transit, or any other physiology. There were no correlations between slow transit and visceral hypersensitivity. Visceral hypersensitivity did correlate with increased rectal compliance, suggestive of increased accommodation reflexes in IBS. CONCLUSIONS: At a tertiary center, slow transit physiology and visceral hypersensitivity typical of IBS are equally common and overlap heavily in constipated patients. PFD physiology does not correlate with slower rectosigmoid colon transit, and is seen equally in all subgroups. No abnormalities were found in 24% of patients. We therefore identify four subgroups in constipation: IBS, slow transit, both, and neither.

Chronic Disease↗

Psychological morbidity in women with idiopathic constipation.

OBJECTIVE: The aim of this study was to examine psychological morbidity in women with idiopathic constipation. METHODS: Three age-matched groups of 47 women with idiopathic constipation (excess straining or decreased bowel frequency), 28 healthy women, and 26 women with Crohn's disease completed a newly devised Perception of Female Self questionnaire, the Intimacy subscale of the Inventory of Interpersonal Problems, the Feminine Traits from the Bem Sex Role Inventory, and the General Health Questionnaire. Thirteen patients had a low bowel frequency (<2/wk), 30 had a normal bowel frequency, and four had increased bowel frequency (>3/day). Of 29 patients with a measured whole gut transit time, 19 had slow and 10 had normal transit. RESULTS: Patients with constipation had significantly increased psychological and social morbidity (anxiety, depression, and social dysfunction) (p = 0.022), increased somatization (p = 0.019), and less satisfaction in their sexual life (p = 0.001) than healthy women. Constipated women with slow transit or decreased bowel frequency did not differ significantly from those with normal transit and bowel frequency. Women with Crohn's disease did not differ significantly on any test from healthy controls. CONCLUSIONS: Women with idiopathic constipation have increased psychological morbidity, altered perception about female self, and impaired intimate relationships. These factors are not present in women with "organic" GI illness also associated with abdominal pain.

Adult↗