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Psoas Fistula and Abscess in a Patient with Crohn's Disease Presenting As

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Psoas Fistula and Abscess in a Patient with Crohn's Disease Presenting As 314 ANNALS OF GASTROENTEROLOGYD. CHRISTODOULOU 2001, 14(4):314-318 et al Case report Psoas fistula and abscess in a patient with Crohns Disease presenting as claudication and hip arthritis D. Christodoulou1, N. Tzambouras1, K. Katsanos1, I. Familias1, K. Tsamboulas,2 E.V. Tsianos1 SUMMARY Abbreviations: CRP: C reactive protein, ESR: Eryth- rocyte sedimentation rate, US: Ultrasonography, CT: Crohns disease is characterized by chronic intestinal in- Computed Tomography, MRI: Magnetic Resonance flammation and not rarely by extraintestinal manifesta- Imaging. tions. Psoas abscess and fistula is a rare complication of Crohns disease, which is sometimes difficult to diagnose INTRODUCTION in the early stage. We describe the case of a 22-year-old male patient with Crohns disease who presented to us with Crohns disease is characterized by a chronic inflam- difficulty in walking and pain in the area of the right hip. A mation of the bowels, which extends to the deeper layers MRI scan of the hip joints was negative for aseptic necro- of the intestinal wall.1 It may involve every part of the sis of the head of femur. An ultrasound examination of the gastrointestinal tract, but in the majority of cases it mainly lower abdomen was also negative, as were the X-rays of the affects the terminal ileum and/or the colon. The disease sacral bone and sacroiliac joints. The patient was treated is characterized by the presence of extraintestinal mani- with non-steroidal anti-inflammatory agents but his con- festations and perianal complications in about 30% of dition worsened and he developed diarrhoea. Subsequent- patients,2 as well as the development of intra-abdominal ly, he developed fever and local tenderness of soft tissues or pelvic abscesses in 10-30%.3 The activity of intestinal of the right hip and buttock. A C/T scan at this stage re- disease is directly related to the presence of perianal vealed a psoas abscess and a fistula in the area of psoas complications, but this is not an absolute rule. muscle. The patient was treated with antibiotics and octre- Perianal complications of Crohns disease include otide and his condition improved dramatically and the external hemorrhoids, anal fissures, perianal abscesses symptoms resolved. The differential diagnosis of sudden and various types of fistulas.4 The most common types of onset of claudication and pain in the hip in a patient with fistulas are the perianal and the enterocutaneous ones. Crohns disease should include the presence of a psoas ab- In some cases the identification of a fistula and its corre- scess. lation with the clinical symptoms may be very difficult.5 Key words: Crohns disease, claudication, psoas abscess, There are only a few reports in the literature of psoas ab- psoas fistula, hip pain. scesses and fistulae in patients with Crohns disease.6-8 We describe a Crohns disease patient who developed a psoas abscess and presented to us with hip pain and 1Department of Internal Medicine (Section on Hepato-Gastroenterol- claudication. ogy), 2Department of Radiology, School of Medicine, University of Ioannina- Greece, Greece CASE REPORT Author for correspondence: A 22-year-old male Greek student presented with Dr Epameinondas V. Tsianos, Professor of Medicine, Director, Department of Internal Medicine, School of Medicine, University symptoms of limp and hip pain. The patient had been of Ioannina, 45110, Ioannina, Greece, Tel: + 30 651 99736, Fax: operated on thirteen months earlier for acute abdomen + 30 651 99736, e-mail: [email protected] pain. At the operation, a mesenteric abscess and acute Psoas abscess in a Crohns disease patient 315 appendicitis had been observed. He had had an uncom- abdomen did not detect any localized tenderness. The plicated postoperative course. Seven months before his digital examination was not indicative of acute rectal in- present visit, he had developed suppuration from a peri- flammation. The laboratory tests were normal except anal abscess. A computed tomography (C/T) scan at this from the Erythrocyte Sedimentation Rate (ESR), which stage had shown an impression of a mass at the terminal was 60mm the first hour and C reactive protein (CRP) ileum including the position of the ileocecal valve, which which was 45mg/dl. caused concentric stenosis of the lumen of ileum. The The patient underwent an evaluation by a rheuma- patient had been referred to the Department of Gastro- tologist. The clinical examination revealed tenderness in enterology. An ileocolonoscopy had revealed deep ul- the movements of the right hip joint and slight limita- cers in the terminal ileum, and edema and nodulous ap- tion of the hip flexion. The x-rays of the sacroiliac joint, pearance of the sigmoid and rectum. The biopsies were pelvis and ischiums were negative. The patient under- compatible with Crohns disease. A barium follow- went a Magnetic resonance imaging (MRI) scan of the through study (enteroclysis) revealed disappearance of hip joints (Figure 2), which was negative. He was admin- normal folds of the terminal ileum and confirmed the istered methylprednisolone 32mg per day and non-ster- concentric stenosis of terminal ileum looking like a hour- oidal anti-inflammatory agents, with the probable diag- glass at a 3cm distance from the ileocecal valve (Figure nosis of hip joint arthritis related to inflammatory bowel 1). The patient was started on mesalamine 3gr per day disease, but his symptoms worsened and he developed per os, and methylprednisolone 32mg per day per os and diarrhea. Non-steroidal anti-inflammatory agents were his symptoms improved. Two months before his present discontinued. A few days later, the patient could not walk, visit, owing to persistence of diarrhea and abdominal and he had to use crutches. His pain on his right hip be- pain, he was administered azathioprine 150mg per day. came unbearable and he developed low-grade fever. Steroids were reduced gradually to low doses, 8mg per day. He was admitted to our Department. On physical examination, he was exhausted. The temperature was At the time of the patients emergency visit, he did 37.7°C, the blood pressure 120/70mmHg, the pulse rate not have diarrhea or abdominal pain. He had one bowel was 85 per minute. Heart sounds were normal and lungs movement per day, without mucus, pus or blood and he were clear on auscultation. The palpation of the abdo- was afebrile. He was defecating without any pain or dis- men did not reveal any localized tenderness. He had lo- comfort. His main concern was the difficulty in walking, calized tenderness in the soft tissues surrounding the right although he could walk without help, and the pain in his hip joint. The digital examination caused pain to the right hip, which did not let him lie on his right side. The patient at this stage. Laboratory tests showed: Hemo- physical examination showed limited movement and ten- globin: 11.2g/dl, Total white cell count: 9.37k/uL (Neu- derness of the right hip joint. The palpation of the lower trophil count: 7.79k/uL), Platelet count: 597k/uL. Creat- inine, glucose, aminotransferases, electrolytes, total pro- Figure 1. Enteroclysis showing disappearance of normal folds of the terminal ileum and a concentric stenosis at a 3cm dis- Figure 2. MRI of the hip joints negative for aseptic necrosis tance from the ileocecal valve. of the head of femur. 316 D. CHRISTODOULOU et al teins, and albumin levels were within normal limits. ESR perianal region and treatment is rather easy. In other was 86mm the first hour and CRP was 203mg/dl. An X- cases the fistulae are more complex and usually result ray of pelvis - sacroiliac joints was done, which was nor- from a subclinical penetration of the intestinal wall by mal. An ultrasound of the lower abdomen did not help. the disease.4 A previous operation in the abdominal cav- An emergency C/T scan of lower abdomen and pelvis - ity or the perianal region, is in many cases, a triggering perineum (Figure 3), was done and revealed an abscess factor for the development of various forms of fistulae in the right psoas and the presence of a blind enteric- in patients with Crohns disease, especially if done as an psoas fistula. The patient was treated with total parenteral emergency operation.11-13 nutrition, intravenous antibiotics (metronidazole plus A spontaneous enterocutaneous fistula can be an second generation cephalosporin plus aminoglycoside), early manifestation of Crohns disease and it usually octreotide subcutaneously (0.1ìg every 12 hours) and opens to the anterior abdominal wall through a previous prednisolone 50mg per day intravenously. Methotrex- abdominal incision,13 or rarely through an intact abdom- ate was substituted for azathioprine. In addition low inal wall or the umbilicus.14 If an inflamed bowel loop molecular weight heparin was administered subcutane- becomes adherent to the bladder or vagina, an enter- ously as a prophylactic measure to avoid deep venous ovesical or enterovaginal fistula may occur. In other cas- thrombosis and pneumonic embolism. The patient had es a fistula may be connected to a chronic pelvic or ret- an excellent response to treatment. After a few days, the roperitoneal abscess and it may extend along another abscess disappeared and did not require percutaneous anatomical region, tracking through the obturator fo- guided or surgical drainage and the fistula became inac- ramen or along the ileopsoas muscle into the hip and tive having tendency for closing. The patient left the hos- thigh.13,15 In such cases, the clinical symptoms may be pital ten days after his admission and he was able to run misleading or mild and the diagnosis may be wrong or without any pain or inconvenience. ESR was reduced to delayed. One must emphasize that on the one hand in 40 mm the first hour and CRP was negative.
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