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PubMed2005

Pyogenic brain abscess: findings from in vivo 1.5-T and 11.7-T in vitro proton MR spectroscopy.

BACKGROUND AND PURPOSE: Metabolites in pyogenic brain abscesses, as detected with in vivo proton MR spectroscopy, are different from those found in brain and can help differentiate pyogenic brain abscesses from necrotic neoplasms. We compared the findings of in vivo with those of in vitro MR spectroscopy and categorized the MR spectral patterns with respect to the causative organisms and abscess size. METHODS: Fifteen patients with pyogenic brain abscesses underwent in vivo 1.5-T (1)H MR spectroscopy and had findings of ring enhancement. The causative organisms were determined from cultures of aspirated pus. Single-voxel (1)H MR spectroscopy was performed with the point-resolved method (1600/270, 135 TR/TE). In six representative patients, in vitro 11.7-T (1)H MR spectra were obtained from the aspirated pus. RESULTS: Three in vivo MR spectral patterns were noted: A) presence of lactate at 1.3 ppm, cytosolic amino acids (leucine, isoleucine, and valine) at 0.9 ppm, alanine at 1.50 ppm, and acetate at 1.92 ppm, with the presence or absence of succinate at 2.4 ppm and lipids (0.8-1.3 ppm), representing mostly obligate anaerobes or a mixture of obligate and facultative anaerobes; B) presence of lactate at 1.3 ppm and cytosolic amino acids at 0.9 ppm, with the presence or absence of lipids but not acetate or alanine (0.8-1.3 ppm), representing mostly obligate aerobes or facultative anaerobes; and C) presence of lactate at 1.3 ppm alone, showing small abscess. Additional resonance peaks of lysine at 1.73 and 3.0 ppm, glutamate/glutamine at 2.09-2.36 ppm, taurine at 3.24 and 3.42 ppm, glycine at 3.55 ppm, and amino acids at 3.75 ppm could be observed in the in vitro MR spectra. CONCLUSION: Results from the in vivo observations were satisfactorily verified by the in vitro experiments. The in vitro measurements may offer complementary information that cannot be extracted from in vivo MR spectra. Determination of the three (1)H MR spectral patterns may be helpful in devising the best possible treatment plans for patients with pyogenic abscesses.

Adult↗
PubMed2005

High fractional anisotropy in brain abscesses versus other cystic intracranial lesions.

BACKGROUND AND PURPOSE: It is known that intracranial mass lesions are relatively isotropic on diffusion-weighted imaging. The purpose of this study is to report an unusually high fractional anisotropy (FA) and mean diffusivity (D(av)) in the cavity of the brain abscess compared with other cystic lesions. METHODS: We performed diffusion tensor imaging (DTI) in 12 patients with cystic intracranial lesions (pyogenic abscess, n = 5; cysticercus cysts, n = 2; and low-grade astrocytoma, n = 5). Mean FA, D(av) from the lesion core, perifocal edema, and corresponding contralateral normal-appearing regions were measured and compared for relative changes in these parameters. In the abscess cases, we placed regions of interest on areas with FA >0.2 and FA <0.2 to get FA and D(av) values. RESULTS: There were two patterns of FA values in the abscess cavity in all five patients. Part of the abscess showed mean FA = 0.440 +/- 0.135, with D(av) = (0.993 +/- 0.185) x 10(-3) mm(2)/s, whereas other parts had FA = 0.131 +/- 0.039 with D(av) = (0.824 +/- 0.183) x 10(-3) mm(2)/s. The cystic tumors and neurocysticercosis showed very high D(av) = (2.806 +/- 0.25, 2.654 +/- 0.35)x 10(-3) mm(2)/s, with low FA = (0.108 +/- 0.037, 0.08 +/- 0.01), respectively. CONCLUSION: Brain abscess cavity shows regions of increased FA values with restricted mean diffusivity compared with other cystic intracranial lesions. This information may prevent misinterpretation of the DTI information as white matter fiber bundle abnormalities associated with mass lesions.

Adolescent↗
PubMedDate not supplied

[Multiple cerebral abscess caused by Nocardia brasilientis].

Streptococcus aureus, streptococci, and enterobacteria were major causative agents of abscesses of the brain. At present, associated infection is responsible for 60% of cerebral abscesses. When systemic and specific immunities are diminished, a risk for cerebral abscesses caused by fungi increases. Among them, there are the most common fungi Candida species or Aspergillus species. The paper gives an example of successful complex treatment of multiple cerebral abscesses caused by an association of Nocardia brasiliensis and Staphylococcus epidermidis. The specific feature of the observation was the correct diagnosis before intraoperative verification of cerebral abscesses. The disease developed in the presence of diminished systemic immunity and in the absence of specific immunity to Nocardia. Immunodeficiency could be caused by prior herpetic infection, Epstein-Barr disease, a wasp bite. The pathogen that was able to cause microstrokes played an indubitable role in the pathogenesis of the disease, which predisposed to the development of cerebral abscesses in patients with immunodeficiency. Impaired blood circulation in the occipital region could be also induced by wasp venom.

Brain Abscess↗
PubMed1992

The diagnosis of intra-abdominal abscesses in patients with severe Crohn's disease.

A series of 24 patients with severe relapses of Crohn's disease responding poorly to conventional treatment with corticosteroids was studied to determine the incidence of intra-abdominal abscesses and the best means to detect them. Ultrasound scans proved to be difficult to interpret and unreliable. Computed tomography demonstrated abnormal bowel thickening in most cases, and showed seven of the eight intraabdominal abscesses. 111In leucocyte scintigraphy always demonstrated inflamed areas of bowel, but underestimated the extent of disease in three patients and overestimated it in five. All eight abdominal abscesses were detected, and there were no false-positive results. It was always possible to distinguish the abscess from inflamed bowel wall. Intra-abdominal abscess is not uncommon in patients with severe relapses of Crohn's disease which are not responsive to corticosteroid therapy, being present in about one-third of patients. 111In leucocyte scintigraphy is a simple and helpful test for differentiating between active inflammatory bowel disease and complicating abscesses, contributing significantly to the management of patients with severe Crohn's disease.

Abscess↗
PubMed2005

[Two cases of Bartholin's gland abscesses caused by Streptococcus pneumoniae and Haemophilus influenzae].

Most of Bartholin's gland abscesses have been thought to be caused by microorganisms found in opportunistic infections. However, we have encountered two very interesting cases of Bartholin's gland abscesses caused by Streptococcus pneumoniae and Haemophilus influenzae, two major pathogens of respiratory tract infections. In the first case, since abscess formation was not observed due to disintegration, cefdinir (CFDN), 300 mg/day, t.i.d. for 5 days was administered. The treatment improved clinical symptoms, but relapse occurred 3 days after the administration was discontinued. Microbiological examination of pus revealed the presence of Streptococcus pneumoniae and Finegoldia magna, and it also showed that the isolated S. pneumoniae was penicillin-resistant S. pneumoniae (PRSP). After an incision and drainage of abscess, cefteram pivoxil (CFTM-PI), 300 mg/day t.i.d. for 7 days, was administered, and the cure was confirmed. In the second case, after an incision and drainage of Bartholin's gland abscess, amoxicillin (AMPC), 750 mg/day, t.i.d. for 5 days, was administered. The treatment improved clinical symptoms temporarily. However, the symptoms deteriorated 7 days after the operation, and the patient was diagnosed with relapse. Microbiological examination of pus revealed the presence of Haemophilus influenzae and Peptostreptococcus anaerobius, and it also showed that the isolated H. influenzae was beta-lactamase-nonproducing ampicillin-resistant H. influenzae (BLNAR). After performing additional incision and drainage of abscess again, CFTM-PI, 300 mg/day, t.i.d. for 7 days, was administered, and the cure was confirmed. In addition, the analysis of these two cases using PK/PD theory revealed that the time above MIC reached 100% with administration of CFTM-PI 300mg, t.i.d. suggesting that the dosage is sufficient for treating these infections. There are other cases of external genitalia infections caused by microorganisms usually associated with respiratory tract infections like cases that we are reporting here. Therefore, it is necessary to consider a possible infection by drug-resistant bacteria even for a case of external genitalia infection. In addition, it was thought that adjusting dosage and method for administration of antibacterial agents based on PK/PD theory would help to rovide efficient treatment.

Abscess↗
PubMed2005

[Abscess formation due to lost stones during laparoscopic cholecystectomy].

Two women aged 79 and 69 years presented with abdominal pain at 15 and 38 months respectively after a laparoscopic cholecystectomy. In both cases perforation of the gallbladder had occurred with spillage of bile and gallstones. A CT-scan carried out at presentation showed signs of an abdominal abscess. The origin of the abscess was initially unknown. The first patient was operated on immediately. In the second patient a drain was placed in the abscess under ultrasound guidance. During operation gallstones were seen in the abscess cavity in both patients. Both patients recovered well. Although perforation of the gallbladder with spillage of gallstones during laparoscopic cholecystectomy often occurs, the incidence of major postoperative complications is low. However, in some cases reoperation is necessary. Removal of all spilled stones is therefore indicated to prevent complications. If abdominal symptoms persist after laparoscopic cholecystectomy, an abscess due to spilled gallstones should be considered. Ultra-sound or CT are the most sensitive means of for tracing spilled gallstones or abscesses.

Abdominal Abscess↗
PubMed2006

[Pyogenic brain abscesses: experience with 60 consecutive cases].

INTRODUCTION: Brain abscess is a focal suppurative process in the brain parenchyma that still carries high mortality rates. Outcome is closely related with a correct and early management. In order to evaluate this management we have reviewed the brain abscesses treated in our Department during the last 14 years. MATERIAL AND METHODS: The authors present a retrospective series of 60 consecutive patients with pyogenic brain abscess treated between January of 1990 and February of 2004 paying attention to the epidemiology, etiology, clinical data, microbiology, treatment modalities and outcome. RESULTS: The male to female rate was 5.6 to 1. The average age was 47 years. Hematogenous spread was most frequent, followed by contiguous spread. In 22% of the cases, the origin was unknown. Regarding the causative pathogens, Gram positive cocci are the most frequent (44%), with a 40% incidence of anaerobics. A mixed infection occurred in 39% of the abscesses. Three modalities of treatment were used: non surgical, catheter drainage-aspiration and surgical excision. Outcome was excellent in 52 patients (86.7%) and 4 patients (6.7%) died. Although outcome was similar in both surgical modalities, drainage-aspiration required a second procedure in 20% of the cases while this was necessary in only 10% of the patients with abscess excision. Length of admission was shorter in the drainage-aspiration group than in the excision group (13 and 26 days respectively). Mortality was higher in patients with low level of consciousness and age over 70 years. CONCLUSIONS: The shorter admission time associated with drainage-aspiration of brain abscesses together with its high efficacy and low morbidity suggests that drainage-aspiration should be used as the first mode of treatment.

Adolescent↗
PubMed1991

A CD18 monoclonal antibody increases the incidence and severity of subcutaneous abscess formation after high-dose Staphylococcus aureus injection in rabbits.

Monoclonal antibody (MAb) 60.3 blocks CD18-dependent polymorphonuclear neutrophil adherence to endothelium and has been shown to be of benefit in preventing tissue injury in a variety of inflammatory conditions. However, concern exists that interference with normal polymorphonuclear neutrophil host-defense functions may increase susceptibility to bacterial infection. We compared the development of subcutaneous Staphylococcus aureus abscesses in rabbits pretreated with MAb 60.3 to those pretreated with saline placebo. Bacterial inoculation with 10(6) or 10(7) colony-forming units (CFU) did not result in abscess formation in either control or antibody-treated groups. However, inoculation with 10(8) CFU resulted in more frequent and larger abscesses in antibody-treated rabbits than in controls. Abscess incidence was similar for inoculation with 10(9) CFU, although antibody-treated rabbits developed larger abscesses than did controls. The difference in abscess development is due to delayed leukocyte migration into inoculated tissue. The results of these experiments suggest that subjects treated with MAb 60.3 and exposed to massive S. aureus inocula may be at serious risk of infection. However, despite inhibited leukocyte adhesion, inocula of up to 10(7) CFU were well tolerated in this model. Whether these findings are clinically important remains to be determined, although exposure to bacterial concentrations of 10(8) CFU or greater occurs only rarely in clinical practice.

Abscess↗
PubMedDate not supplied

Tongue abscesses: MR imaging findings.

BACKGROUND AND PURPOSE: A lingual abscess is difficult to diagnose in the absence of physical signs. MR imaging may provide an excellent and invaluable adjunct to clinical examination, but the literature is incomplete in defining the various MR imaging findings of abscess. The objective of this study was to determine the MR imaging features of tongue abscesses. METHODS: Seven surgically proved tongue abscesses were evaluated with MR imaging. Four patients underwent MR imaging because of suspected tumor, and 3 patients, to show the extent and precise anatomic location of the lesion. Lesions were assessed with regard to the location, size, signal-intensity characteristics, and pattern of contrast enhancement. RESULTS: Five lesions were located in the anterior tongue and 2, in the posterior tongue. The central parts of 4 anterior tongue abscesses were hypointense, surrounded by a hyperintense wall on T1-weighted precontrast images. On postcontrast images, marked wall enhancement was detected. On T2-weighted images, a markedly hyperintense central part surrounded by a hypointense rim was seen. In 2 of these patients, there was a hypointense halo surrounding the wall (target sign). In 3 patients, a perilesional hyperintense area that enhanced diffusely after contrast administration was detected on T2-weighted images. The smallest lesion located in the anterior tongue was hypointense on T1-weighted images and enhanced diffusely on postcontrast images. On T2-weighted images, a markedly hyperintense central part surrounded by a mildly hyperintense peripheral part was depicted. Posterior tongue lesions appeared as polypoid ill-defined masses and were hypointense on T1-weighted images and heterogeneously hyperintense on T2-weighted images. On postcontrast images, the lesion in 1 patient showed diffuse and heterogeneous contrast enhancement, whereas the lesion in another patient enhanced peripherally. The lesions were totally excised in 4 patients and drained with surgical incisions in 3 patients. No recurrence was detected on follow-up. CONCLUSION: An abscess typically presents as a cystic lesion surrounded by an enhancing capsule formation, but lesions may also present as solid masses that enhance diffusely or peripherally.

Abscess↗
PubMed1991

Leucocytes labelled with 99mTc-HMPAO in the detection of abdominal abscesses.

To assess the value of 99mTc-HMPAO-labelled-leucocyte scintigraphy in the detection of abdominal abscesses, the results of 74 examinations in 69 patients suspected of having abscesses on clinical grounds were reviewed retrospectively. Of a final total of 29 abscesses in 28 patients, leucocyte scanning diagnosed 26, giving a sensitivity, specificity, and accuracy of 90%, 91%, and 91%, respectively. In 22 patients abscesses were diagnosed within 30 min. In 13 of the 74 examinations (18%) an infection or inflammatory lesion other than an abscess was diagnosed. 99mTc-HMPAO-labelled-leucocyte scintigraphy is an accurate and rapid method of diagnosing abscesses in acutely ill patients.

Abdomen↗
PubMedDate not supplied

[Laparoscopic drainage of liver abscess. Initial experience].

BACKGROUND: Radiologically guided percutaneous drainage has proven to be simple and effective and currently is considered the gold standard of care with success rates between 80 and 87%. However, not all abscesses are amenable to or will resolve with percutaneous drainage. The purpose of this study is to report our 1-year initial experience with laparoscopic drainage of liver abscesses. METHODS: Patients with diagnosis of liver abscess and who had a surgical indication and were submitted to laparoscopic drainage were studied prospectively from January to December of 2004. RESULTS: Six patients underwent laparoscopic drainage. There were three men and three women with a mean age of 50.8 years. Four patients had single lesions and two had multiple lesions. Mean size of the abscesses was 10.9 x 7.7 cm, segments primarily affected were 5 and 8. Two patients had amebic and four pyogenic abscesses. Mean operative time was 142 min. All patients were eating by the day following surgery and were ambulating between 24 and 72 h postoperatively. All patients reported to be asymptomatic at the time of their last visit. There was one recurrence that resolved with a second procedure. CONCLUSIONS: Success rate with the laparoscopic drainage of liver abscesses (83.3%) makes this procedure an effective and viable surgical alternative as a primary approach in selected patients or after a failed percutaneous drainage.

Drainage↗
PubMed2006

A retrospective study of peritonsillar abscess in Riyadh Medical Complex [corrected].

OBJECTIVE: To investigate and study the management pattern of peritonsillar abscess, the male to female ratio and incidence. Also, to evaluate the causative organism isolated from abscess and reported by culture/sensitivity (C/S). METHODS: This study has been designed as a single centered retrospective hospital based study. We carried out this study in the Department of ENT, Riyadh Medical Complex, Saudi Arabia from 2000 to 2004. We gathered the data via survey (5 years). There were 81 patients admitted for the management of peritonsillar abscess. RESULTS: Mean age of patients was 22 years (range 10 to 60 years; 44 male, 37 female). The hospital stay varies from 1-8 days with a mean of 4 days. The left side is more involved. Treatment consisted mainly incision/drainage under local anesthetic in 47 patients (58%), while 5 cases (6%) were carried out under general anesthetic. Aspiration and conservative treatment was noted in 25 (31%) cases, abscess tonsillectomy was carried out in 3 (4%) cases. The most common microorganisms isolated from C/S is Group A beta hemolytic streptococcus (17/81 [21%]). Penicillin G + Flagyl (49/81 [60%]) were the most common antibiotics used. No case of bilateral peritonsillar abscess was found and there is no consensus regarding the best technique. Options include needle aspiration, incision and drainage and immediate tonsillectomy. CONCLUSION: Peritonsillar abscess remain one of the acute admission in the Department of Otolaryngology at Riyadh Medical Complex, Riyadh. Incision/drainage remains the gold standard treatment, Penicillin G + Flagyl combinations are the cornerstones.

Adolescent↗
PubMed2006

[Pyogenic liver abscesses: a study of 25 cases].

OBJECTIVE: Our aim was to study the anatomo-clinic particularities and the therapeutic modes of the infectious abscesses of the liver. PATIENTS AND METHODS: Our retrospective study concerns 25 cases of the infectious abscesses of the liver collected on one period of 12 years from January 1992 to December 2003. They are 11 primitive abscesses and 14 secondary abscesses. RESULTS: We noted 14 women and 11 men, median age was 51.5 years. The Fontan triad was present in 7 cases. A liver mass with an abdominal sensitivity was found in 14 cases. Anomalies in the biologic exam of the liver were present in the 1/3 of the cases. We noted a double right and left localization in 3 cases and a multiple localization in 1 case. The hemoculture and the pyoculture permitted a bacteriological diagnosis in 52%. The percutaneous treatment achieved in 7 cases, permitted the recovery in 2 cases. One dead was noted following a severe cardiopathy. A surgical drainage has been achieved at 22 patients. 4 cases after the failure of the percutaneous treatment. Mortality rate was 20% (5 cases) related to the delay of diagnosis, the gravity of the septic shock. the advanced age and the flaws associated. CONCLUSION: The infectious abscess of the liver was a serious affection that affects the vital prognosis. The percutaneous treatment associated to the antibiotherapy. is the method of choice in the treatment of the abscesses of the liver. The surgical treatment must be reserved to the failure of the percutaneous treatment.

Adult↗
PubMedDate not supplied

[Empiric antibiotic therapy in the treatment of postoperative abdominal abscesses. Clinical and microbiological data].

Abdominal abscesses arising postoperatively constitute a serious problem, particularly in the field of oncological surgery. The aim of our study was to interpret clinical and microbiological data relating to a population of oncological patients, undergoing ultrasound-guided drainage for postoperative abdominal abscesses, so as to be able to better plan empiric antibiotic therapy. We therefore retrospectively analysed the data of 24 patients operated on for neoplastic pathologies and treated with ultrasound-guided percutaneous drainage for abdominal abscesses during the postoperative period. Microbiological and clinical data showed that abscesses located in the lower abdominal regions almost always present a polymicrobial growth, though abscesses in the upper regions are more frequent. Moreover, the antibiotic assay results prompted us to consider the use of beta-lactamines, quinolones and glycopeptides more favourably, in view of their greater efficacy against the microbes tested. Thus, the planning of empiric antibiotic therapy should be based above all on the anatomical-topographic location of the abdominal abscess and on the type of operation performed, with thorough assessment of the use of the above-mentioned antibiotics.

Abdominal Abscess↗
PubMed1992

Critical review of the treatment of pyogenic hepatic abscess.

A retrospective review of 29 consecutive patients with pyogenic hepatic abscesses was undertaken to ascertain the efficacy of various treatments. Percutaneous routes were used 25 times (aspiration alone in 16 and with concomitant drainage in nine), as a primary step 22 times and for recurrent abscesses, three times. An operation was required in nine patients; initially in five and after percutaneous treatment in four. Antibiotics alone were used twice. There were seven deaths, two after antibiotics alone and five after initial percutaneous aspirations. There were six recurrent abscesses, all but one after percutaneous aspiration. Our results suggest that antibiotics alone and percutaneous aspiration alone are inadequate in the treatment of pyogenic hepatic abscesses; percutaneous management is valid provided concomitant drainage is used, and that once the abscess has been successfully handled percutaneously, surgical treatment is a safe alternative as a first step, for abscesses recurring after percutaneous management, or for removal of the primary cause of the disease.

Adult↗
PubMedDate not supplied

[Problems of diagnosis and treatment of otogenic abscesses of the brain in children].

In 1947-89, 49 children with otogenic abscesses of the brain and cerebellum were treated in the ENT department of the Kuban Medical Institute. During the first two decades the number of these patients was 34 and during the second two decades it was 15, i.e., the number decreased two-fold. In 25 cases, abscesses were located in the temporal lobe, in 14 cases--in the cerebellum, and in 10 cases, multiple abscesses of different localization were diagnosed. For diagnostic purposes electroencephalography, echoencephalography, angiography, pneumography and ventriculography were used although they were sometimes inefficient, especially in the cases of multiple abscesses. Computer tomography made it possible to determine not only the number but also specific localization of abscesses. The method was applied in 8 cases. After proper examination and treatment all the patients recovered. Out of 49 patients 28 recovered and 21 died. Out of 34 patients treated during 1947-67, 17 recovered and 17 died while out of 15 patients treated during 1968-1989, 11 recovered and 4 died. It can be concluded that a significant reduction of the number of cases with brain abscesses and a substantial increase of the success rate can be attributerd to the advanced methods of their detection (echoencephalography and computer tomography) and more efficient methods of therapy of middle ear suppuration.

Adolescent↗
PubMed1991

[Contribution of echography in the diagnosis ruptured liver abscess (Apropos of 4 cases)].

The authors report 4 cases of ruptured hepatic abscesses in peritoneum (2 cas) and in pleural (2 cases). The cases occurred in 3 men (two of them were alcoholic) and one woman who was in the postpartum period. The cases confirm the classic pictures according to which, ruptures of hepatic abscesses have unclear clinical presentation whether they are amoebic or bacterial in origin! In these cases, ultrasound is very useful in the rapid detection of peritoneal or pleural abscesses which can be confirmed by ultrasonically guided fine needle punction When the channel from the intra hepatic abscess can be visualised, or when they are a coexisting hepatic and peritoneal pleural abscesses, the diagnosis is clear. However when the abscess has been completely emptied of its contents the diagnosis may the difficult.

Adult↗
PubMed1991

Stripping out pus in lactational mastitis: a means of preventing breast abscess.

OBJECTIVE: To determine whether manual stripping of pus from the breasts of women with lactational mastitis is effective in preventing the formation of breast abscesses. DESIGN: Case series (chart review). SETTING: Family practice in Montreal. PATIENTS: All (475) charts of patients with lactational mastitis were reviewed; 61 women were excluded because they already had a breast abscess. Most of the patients had been referred. OUTCOME MEASURES: Abscess formation, length of illness after treatment, rate of recurrence of mastitis, illness in the mother or infant within the 6 weeks after the mastitis and continuance of breast-feeding. MAIN RESULTS: The duration of symptoms before treatment was 1 to 56 (mean 5.3) days. In 9% of the cases both breasts were affected, and in 23% at least one episode of mastitis had previously occurred. The stripping technique was applied to all the patients. Pus was removed in 210 women; the remaining women were considered to have cellulitis. Only four patients (less than 1%) had breast abscesses. The mean length of illness after treatment was 7.2 days. The rate of recurrence was 14%. In all, 6% of the mothers and 9% of the infants became ill in the 6 weeks after the mastitis. Most (92%) of the patients continued to breast-feed. CONCLUSIONS: The rate of abscess formation was considerably lower than the rates reported in the literature. Therefore, manual stripping of pus from the infected breasts of lactating women appears to be effective in preventing breast abscesses.

Abscess↗