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Appendicular torsion is a rare condition. Since the time of of the first report in 1918, documentation of this entity remain rare. The exact diagnosis is mainly made intra-operatively. This is a pediatric case report of 5-year-old girl with 360o anti-clockwise rotation of the appendix leading to an appendicular peritonitis. Subsequently, primary or secondary appendicular torsion could be included as an uncommon aetiology of acute appendicitis.

Neurofibromas are thick and irregular benign neural sheath tumors touching the peripheral nerve and it may occur at any point along a nerve. Neurofibromas occur frequently as a neurofibromatosis manifestation and less commonly solitary, in unusual sites without neurofibromatosis. The imaging especially MRI is relatively helpful to determine radiological features necessary for the diagnosis, but the definitive diagnosis is established basing on the histopathological examination of the specimen. The primary therapeutic approach for neurofibromas is a complete surgical removal to prevent tumor recurrence. This article highlights a rare case of unusual soft tissue huge solitary neurofibroma in the sacral region without neurofibromatosis in a 12-old-girl.

Pleomorphic hyalinizing angiectatic tumor (PHAT) is a particular rare entity corresponding to soft tissue neoplasm with low malignant potential. The exact etiopathology responsible for the tumor occurrence is not exactly identified. Knowledge of this condition is necessary to avoid misdiagnosis of the lesion and subsequently, to adopt the proper management. Here we report a case of PHAT originating from soft tissue in the pelvic retroperitoneum. According to the litterature, few articles deal with such pathology and such location. This work illustrates features of the tumor, its characteristics, and the adequate management with the histopathological findings.