Rare, primary iliac, pubic and ischial tumours in children (report of 14 cases)--Part II

Primary Pelvic Bone Tumours in Children and Adolescents — Imaging Correlation

Eight children aged 6 to 17 years (mean 13.3 years) were examined using conventional radiography, radionuclide bone scintigraphy, CT and MR imaging for pre-treatment assessment of extensive primary pelvic bone tumours. The tumours evaluated were Ewing's sarcoma (n = 4), osteogenic sarcoma (n = 3), and chondrosarcoma (n= 1). Each imaging modality made a contribution to the evaluation of the primary tumour. Conventional radiography and bone scintigraphy were necessary for the initial diagnosis, with CT playing a complementary role. MR imaging and/or dynamic contrast-enhanced CT were mandatory prior to surgical resection.

Hemangioma of the Ilium Simulating an Aggressive Bone Lesion on Imaging

We present the case of a 35-year-old man with a hemangioma in the iliac wing that simulated an aggressive bone lesion on CT, MRI, and bone scintigraphy. On CT, the lesion, 12 cm in in maximum dimension, was expansile and septated. On MRI, the lesion was isointense with respect to muscle on T1 weighted images, and hyperintense on T2 images, with focal regions of cortical breach. Radionuclide bone scan showed increased tracer accumulation. The diagnosis was made following surgical biopsy, and the lesion was treated conservatively.

Intraosseous haemangioma of the ilium

Intraosseous haemangioma, an uncommon benign vascular tumour, is most commonly seen in adults and tends to involve the vertebrae and the skull. Lesions of flat bones are rare and the imaging findings in these patients are non-specific. We report a unique case of intraosseous haemangioma in the ilium of a 7-year-old girl studied by US, radiography, scintigraphy, CT and MRI.

Pelvic chondrosarcoma in an 18-year-old man masquerading as tuberculous ilipsoas abscess

Chondrosarcoma is distinctly uncommon in the younger age group. We report an unusual presentation of pelvic bone chondrosarcoma in an 18-year-old man clinically creating an impression of tuberculous abscess, and we discuss the CT and MRI appearances.