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At least 19 recordsLinked to original sources
PubMed2005

[Abscess of the psoas muscle caused by a psoas compartment catheter. Case report of a rare complication of peripheral catheter regional anaesthesia].

A 27-year-old female patient was continuously treated with a psoas compartment catheter for pain therapy. The catheter was placed under strictly aseptic conditions. After 5 days a painful swelling and erythema were observed at the catheter introduction site and the catheter was removed. At the tip of the catheter a staphylococcus aureus infection was detected. A few days after removing the catheter, the patient showed signs of a general infection such as fever and an increase of CRP. An abscess of the psoas muscle was diagnosed via computer tomography. After treatment with antibiotics the abscess was healed and the patient was discharged after 21 days. An abscess of the psoas muscle is a rare complication of psoas compartment catheters. Erythema, pain or swelling at the site of introduction can be a sign of infection and the catheter must be removed immediately. In addition to the case report a review of the literature is given with data on risk management and own infection rates by 2304 peripheral pain catheters.

Adult↗
PubMed1998

Back extensor and psoas muscle cross-sectional area, prior physical training, and trunk muscle strength--a longitudinal study in adolescent girls.

The association between physical training, low back extensor (erector spinae plus multifidus muscles) and psoas muscle cross-sectional areas (CSA) and strength characteristics of trunk extension and flexion were studied in adolescent girls. A group of athletes (n = 49) (age range 13.7-16.3 years) consisting of gymnasts, figure skaters and ballet dancers was age-matched with non-athletes (n = 17) who acted as a sedentary control group. The CSA of psoas muscles and multifidus plus erector spinae muscles were measured from lumbar axial images by magnetic resonance imaging. Maximal trunk extension and flexion forces were measured in a standing position using a dynamometer and trunk musculature endurance was evaluated using static holding tests. When CSA were adjusted with body mass, the athletes showed significantly greater CSA in both muscles studied (psoas P < 0.001; erector spinae plus multifidus P < 0.05) than the non-athletes. The athletes also had a greater absolute psoas muscle CSA (P < 0.01) and trunk flexion force (P < 0.01) compared to the controls. When the forces were expressed relative to body mass, the athletes were superior both in trunk flexion (P < 0.001) and extension (P < 0.001). There was a significant correlation between muscle CSA and strength parameters, but the force per muscle CSA did not differ significantly between the athletes and the non-athletes. In addition, the athletes showed a better body mass adjusted muscle endurance in trunk flexion (P < 0.05) than the non-athletes. Our study indicated that regular physical training enhances trunk musculature hypertrophy, force and endurance in adolescent girls, and that there is an association between muscle CSA and strength parameters.

Adolescent↗
PubMed1989

[Limp as a presenting symptom of psoas muscle inflammation].

Inflammatory irritation of the psoas muscle in children is rare. The initial diagnosis may be difficult because of the similarity between the symptoms of psoas muscle inflammation and septic hip joint. We present a boy and a girl, both 3.5 years old, with psoas muscle inflammation, whose initial clinical and laboratory findings could be explained by either septic hip joint or osteomyelitis. Both presented with fever and limp. 1 developed an acute abdomen within 3 days and at operation a retrocecal periappendicular abscess was found. In the other, left lower quadrant, abdominal pain developed 4 days following admission and ultrasonic findings indicated a left psoas muscle abscess. We suggest that psoas muscle inflammation should be added to the differential diagnosis of limp in children. Early correct diagnosis can be established by proper physical examination, including rectal examination, and with the aid of diagnostic tools such as ultrasound, computerized tomography or both.

Child, Preschool↗
PubMed1992

[Primary pneumococcal abscess in the psoas muscle].

Primary psoas abscesses are rare and the pathogenesis is obscure. In most cases Staphylococcus aureus is the causative bacterium. Therapy consists of drainage of the abscess and antibiotics. In this article we present a patient with a primary psoas abscess caused by a Streptococcus pneumoniae infection.

Aged↗
PubMed1993

[Hydatid cyst of the psoas muscle].

Hydatid cysts in the psoas muscle are unusual. The authors report a case of a hydatid cyst which had developed within the psoas muscle and was detected from a mass in the left iliac fossa which was diagnosed before surgery by ultrasound and a CT scan, which remain the preferred primary examinations for the investigation of masses of this type. The authors discuss the various possible clinical and paraclinical contexts and recommend total pericystectomy of a closed cyst as the best treatment following extraperitoneal iliac surgical opening.

Adult↗
PubMed1976

Quantitative studies on the polarization optical properties of striated muscle. I. Birefringence changes of rabbit psoas muscle in the transition from rigor to relaxed state.

The changes in birefringence in the rigor to relax transition of single triton-extracted rabbit psoas muscle fibers have been investigated with quantitative polarized light techniques. The total birefringence of rest lenght fibers in rigor was (1.46 +/- 0.08) x 10(-3) and increased to (1.67 +/- 0.05) x 10(-3) after Mg-ATP relaxation. Pyrophosphate relaxation increased the total birefringence only slightly, whereas subsequent Mg-ATP relaxation elicited the maximum increase in birefringence. Changes in lattice spacing did not account for the total increase in birefrigence during relaxation. Moreover, the increase in total birefringence was attributable to increases in intrinsic birefringence as well as form birefringence. No change in birefringence was exhibited upon exposure to a relaxation solution after myosin extraction. Synthetic myosin filaments were prepared and treated with relaxation and rigor solutions. The negatively stained filaments treated with a rigor solution had gross irregular projections at either end, while the filaments treated with a relaxing solution were more spindle shaped. The results are compatible with the view that the subfragment-2 moieties of myosin angle away from the myosin aggregates (light meromyosin) to permit the attachment of the subfragment-1 moieties to actin.

Adenosine Triphosphate↗
PubMed2002

Ruptured mycotic aneurysm of the iliac artery complicated by emphysematous psoas muscle abscess: report of two cases.

Emphysematous psoas muscle abscess has rarely been described and has not been reported to be associated with ruptured mycotic aneurysm. We report two cases of ruptured mycotic iliac arterial aneurysm complicated by emphysematous abscess of the left psoas muscle. Case 1 occurred in a 70-year-old man and Case 2 in a 63-year-old woman. Both patients presented with fever for several weeks. Clinical clues leading to the diagnosis included a palpable abdominal mass with (Case 2) or without (Case 1) pulsation, blurring of the psoas muscle shadow with abnormal gas distribution on the plain abdominal film (Case 1), and peripheral vascular insufficiency and Salmonella bacteremia (Case 2). Ruptured mycotic aneurysm of the left iliac artery complicated with left psoas muscle abscess was clearly demonstrated by abdominal computerized tomography scan and intravenous digital subtraction angiography in both cases. Causative agents, multi-drug resistant Acinetobacter baumannii and Klebsiella pneumoniae, unusual pathogens for mycotic arterial aneurysm, were cultured from debrided tissue in Case 1, and this finding led to the speculation that the infection was hospital-acquired. The favorable outcome in Case 2 resulted from early vascular surgery and a prolonged course of effective antimicrobial therapy.

Aged↗
PubMed1996

[Spontaneous staphylococcal abscess of psoas muscle].

An abscess of the psoas muscle is a rare occurrence and pathogenetic interpretation usually proves difficult. Abscessing of the psoas may be due either to direct diffusion of infections of adjacent structure or to hematogenous spread. However, not uncommonly, a "spontaneous" abscess occurs, which cannot be correlated to other sites of infections or sepsis. The Authors describe two cases of abscesses of the psoas muscle following Staphylococcus aureus sepsis of unknown origin.

English Abstract↗
PubMedDate not supplied

[Colonic interposition between kidney and psoas muscle: anatomical variation studied with CT].

Interposition of the colon between kidney and psoas muscle may represent a benign anatomical variant that can be recognized on Computed Tomography (CT) images. In our series including 428 abdominal CT examinations, the position of the bowel in the pararenal space was studied with respect to the kidney and the psoas muscle. To determine the colon position in the pararenal space, three CT scans, at the upper pole, midkidney and lower pole, for each side, were selected. The colonic interposition between the kidney and the psoas muscle was then correlated with patient's age, sex and amount of perinephric fat. The ascending colon was interposed between the kidney and the psoas muscle in 6/428 cases (1.4%), appearing more frequently in adult men. Of these 6 cases, CT showed decreased perinephric fat in three cases, normal in one and increased in two. No case of descending colonic interposition between the kidney and the psoas muscle was demonstrated. CT is a valuable tool to depict this anatomical variation, preventing misdiagnoses and complications arising from interventional procedures.

Adult↗
PubMed1996

Adenocarcinoma of the lung metastatic to the psoas muscle.

Hematogenous metastasis to the psoas muscle is rare, and the resulting clinical symptoms may mimic psoas abscess or hemorrhage. When the clinical history is not specific, CT is important in documenting the presence of a psoas mass and providing biopsy guidance for histologic diagnosis. Only three previously reported cases have been related to a primary carcinoma of the lung.

Adenocarcinoma↗
PubMedDate not supplied

[Retroperitoneal hematoma secondary to traumatic rupture of the psoas muscle].

Rupturing of the psoas muscle by closed injury as a result of the formation of a retroperitoneal hematoma is a very uncommon pathological entity, which may rise problems of differential diagnosis with kidney lesions. Supplementary explorations do not always clear up diagnostic doubts, and it is surgery, if indicated, that confirms the picture. We present a case of retroperitoneal hematoma of traumatic origin in a one-kidney ipsilateral patient, in whom the abdominal CAT revealed affection of the renal capsule associated with rupture of teh psoas. In the surgery carried out due to formation of an abscess in the hematoma we verified that the kidney was undamaged.

Adult↗
PubMed1990

Solitary benign schwannoma in the psoas muscle.

Solitary benign schwannoma in the psoas muscle is extremely rare. Here we present a case report of a woman who had solitary benign schwannoma in the psoas muscle not associated with von Recklinghausen's disease. This is the fifth case reported in the literature.

Adult↗
PubMed1986

Psoas muscle disorders: MR imaging.

Nineteen patients with evidence of psoas and iliopsoas abnormalities on computed tomographic (CT) scans (12 with metastases, three with lymphoma, two with hematoma, and two with abscess) were examined with magnetic resonance (MR) imaging. The abnormal psoas could be identified on both T1- and T2-weighted spin-echo images, although T2-weighted sequences provided better contrast. The psoas muscle can be affected by one of three mechanisms: total replacement, lateral displacement, or medial displacement. In four patients in whom the CT study showed apparent enlargement of a psoas muscle, subsequent MR imaging examinations demonstrated that the psoas muscle was compressed and displaced laterally by a paraspinal mass. MR images provided better contrast between the normal and abnormal psoas than CT scans in nine cases; MR images were inferior to CT scans in two cases because calcifications (one case) and air bubbles within an abscess (one case) were not detectable.

Abscess↗