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Year : 2005  |  Volume : 15  |  Issue : 2  |  Page : 255-258
A case report - iliac bone tuberculosis with iliopsoas abscess

Department of Radio-diagnosis, Bowring and Ladycurzon Hospitals, Bangalore Medical College, Bangalore, India

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Keywords: Tuberculosis, Iliopsoas Abscess, Crossed Ectopia

How to cite this article:
Satishchandra H, Anuradha, Virupaxappa T K. A case report - iliac bone tuberculosis with iliopsoas abscess. Indian J Radiol Imaging 2005;15:255-8

How to cite this URL:
Satishchandra H, Anuradha, Virupaxappa T K. A case report - iliac bone tuberculosis with iliopsoas abscess. Indian J Radiol Imaging [serial online] 2005 [cited 2020 May 26];15:255-8. Available from:

   Introduction Top

Skeletal tuberculosis is common among the developing countries. Tubercular cold abscess usually is a sequale of spondylodiscitis. Tuberculosis involving the pelvic bones with abscess formation is a relatively rare entity. Tuberculosis of the sacroiliac joint, sacrum, and pubic bones have been reported. Here we report a case of tubercular osteolytic lesion of the iliac bone with iliopsoas abscess.

   Case report Top

A twenty two year old young man was referred for ultrasound abdomen for right iliac fossa mass with clinical suspicion of  Spigelia More Detailsn hernia .He had history of weight loss and dragging pain in the right iliac fossa.Ultrasound examination revealed a large abscess arising from the iliacus muscle [Figure - 1][Figure - 2] with the abscess continuing up to the insertion of iliacus at the lesser trochanter, coursing lateral to femoral vessels[Figure - 3]

Abscess was seen to extend through the abdominal muscle fascicles and pointing subcutaneously with few calcified foci within the abscess.[Figure - 4]

A large defect was noted in the right iliac bone through which the abscess extended into the gluteal muscles[Figure - 5] . Incidentally crossed fused ectopia of left kidney was noted.

Ultrasound diagnosis of iliac bone defect was confirmed when radiogram of pelvis was taken and a large lytic lesion was noted in the right iliac bone [Figure - 6]

The patient underwent CT scan of abdomen and pelvis.CT revealed a loculated collection in right iliopsoas muscle with subcutaneous extension in the right inguinal region,right gluteus medius and minimus with destruction of iliac bone .[Figure - 7][Figure - 8][Figure - 9]

One lymph node was noted in the aortocaval region.There was no free fluid in abdomen or pelvis. Thickened pleura was noted on the left side.Spine appeared normal.Ultrasound diagnosis of incidental crossed fused ectopic left kidney with fusion at the lower pole of right kidney was confirmed[Figure10]

The patient was started on antitubercular therapy after nondependent drainage of about two hundred and fifty ml of pus,after confirmation by biopsy. Residual collection with abscess in the process of resolution can be seen on follow up sonography[Figure - 11] after one and a half month. On follow up the patient is doing well.

   Discussion Top

Skeletal tuberculosis is one of the important manifestations of extrapulmonary tuberculosis. Skeletal involvement constitutes less than 3%[1] of tuberculosis.

Fifty to sixty percent[2] of skeletal tuberculosis involve spine. Involvement of flat bones like innominate bone is a rare entity, true incidence not being known Radiographs reveal irregular cavities and areas of bone destruction with little surrounding sclerosis or periosteal reaction, unless secondary infection through a sinus supervenes. If complicated by secondary infection, it may be difficult to differentiate tubercular osteomyelitis from pyogenic osteomyelitis.

Most common appearance of tubercular abscess is a hypoechoic and inhomogeneous pattern .Sometimes

the caeseum makes the abscess solid and hyperechoic[3] .Calcifications occasionally can be seen , particularly in tubercular abscess [4,6], as in our case. Ultra sound has proved to allow early unquestionable diagnosis of tubercular abscess and to confirm clinical suspicion.

During the destructive phase of the disease, CT clearly shows the sequestration and cortical breaks. CT also outlines the extent of the bone destruction [1],[5] soft tissue involvement and is helpful in facilitating biopsy .

The basic treatment of patients with skeletal tuberculosis is adequate and prolonged antituberculous therapy. Plain radiographs, CT scans, and MRI done during the follow-up of these patients may show advancing lesions up to 3 to 4 months after the start of treatment. This is because the imaging appearances lag behind the biologic process of repair. Even after complete clinical and radiological healing, there may be residual cavities observed on serial CT scans or on radiographs. These are of little consequence regarding the durability of healing and chances of recrudescence. These cavities are filled with fibrous or fibro-osseous tissue and do not warrant surgical intervention. If however, the imaging done at 6 to 7 months of adequate chemotherapy shows evidence of deterioration of the lesion, one should suspect a non-responding lesion, which may be caused by drug resistant disease, an immunocompromised state, or a non-tuberculous disorder. Repeat biopsy and tissue diagnosis (with or without debridement) becomes mandatory in these patients .

When considering the site - the right iliac fossa , with involvement of iliopsoas muscle , differential diagnosis of pyogenic abscess,haematomas ,enlargement of iliopsoas bursa, hernias and pseudoaneurysms are to be considered[4]

Thus imaging plays a very important role in the diagnosis of skeletal tuberculosis . we have reported this case due to the unusual site of involvement of skeletal tuberculosis.[8]

   References Top

1.Babhulkar SS,Pande SK Clinical orthopedics 2002 may [398]:114-20 Unusual manifestation of osteoarticular tuberculosis.  Back to cited text no. 1    
2.Dr M Natarajan and Dr N Mayilvahanan. Book of orthopedics and traumatology chapter-5  Back to cited text no. 2    
3.Grandolfo N Serrato O Sandrone C Radiology med 1993 may;85[5]:574-8,Role of echography in osteolytic tubercular abscesses.  Back to cited text no. 3    
4.John R Haaga , Charles F Lanzieri Robert C Gilkeson ;CT and MR imaging of whole body,1705-7  Back to cited text no. 4    
5.Morris BS Verma R Garg A Aswathi M Maheshwari M Skeletal radiology 2002 jan ;31[1]:1-8.Multifocal musculoskeletal tuberculosis in children, appearances on CT.  Back to cited text no. 5    
6.SK Sharma, A Mohan, Tuberculosis, jaypee publications , page 228  Back to cited text no. 6    
7.Ramakrishaiah VP Jain V Choon AT Rao BH,Journal of Indian medical association 2000 march;98[3]:128-9 retroperitoneal cold abscess with tuberculosis of SI joint and pubic bone , a case report of unusual presentation  Back to cited text no. 7    
8.Arch pediatric 1994 may1[5];489-92 Sacral bone tuberculosis in a six year old child .  Back to cited text no. 8    

Correspondence Address:
H Satishchandra
Dept. of Radio-Diagnosis, Bowring and Ladycurzon hospitals, Bangalore Medical College, Bangalore
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0971-3026.28816

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[Figure - 1], [Figure - 2], [Figure - 3], [Figure - 4], [Figure - 5], [Figure - 6], [Figure - 7], [Figure - 8], [Figure - 9], [Figure - 10], [Figure - 11]

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