Malignant peripheral nerve sheath tumor of the small bowel is an extremely rare disease. Histologic distinction from other types of soft tissue sarcoma especially fibrosarcoma and leiomyosarcoma requires electron microscopy. Complete surgery remains the only curative treatment. However, late diagnosis makes curative surgery more difficult. The contribution of chemotherapy to incomplete surgery has been proved without controlled studies. We report a case of this type of lesion discovered following a small bowel perforation.

Malacoplakia is a granulomatous inflammatory disease, has a preference for the urogenital tract and less frequently affects gastrointestinal tract and the retroperitoneal region. It is caused by a disorder of macrophage bactericidal function. Its definition is pathological. We report the unusual case of a male patient who was under long term corticotherapy to the long course. He presented with retroperitoneal pseudotumoral malacoplakia revealed by left flank mass and pain. Radiological examination showed a pararenal abscess localized in the retroperitoneum and extended to psoas muscle. Pathological examination for biopsy specimen confirmed the lesion to be malakoplakia characterized by the presence of von Hansemann cells and Michaelis-Gutmann bodies. The patient was treated with ciprofloxacin. He remains on a regular check-up with good clinical and radiological response.

Solitary fibrous tumor is an uncommon neoplasm affecting adults and typically located in the pleura and can also occur in a large number of other extra thoracic sites. We present the case of a solitary fibrous tumor (SFT) of the retroperitoneum and describe their histopathological and immunohistochemical features. The identification of SFT in the retroperitoneum is of importance because its clinico-pathological behaviour is still unclear. The pathologist plays a fundamental role in establishing both the positive and differential diagnosis.

No abstract

No abstract