CT and MR imaging of a huge retroperitoneal synovial sarcoma: A case report.

Retroperitoneal synovial sarcoma is extremely rare, with only a few cases reported in the literature. The diagnosis is often made late, due to anatomical considerations, with common symptoms including low back pain and weight loss. Imaging is critical for diagnosis, often revealing a heterogenous mass with the "triple sign" and calcifications.

A rare case of Ewing's sarcoma of the maxillary sinus.

Ewing's sarcoma is generally an aggressive, poorly differentiated bone and soft tissue tumor affecting children and young adults, it accounts for 4%-6% of all primary bone tumors and primary facial locations occur in only 1%-4% of all cases, primarily in the mandible and calvaria. Involvement of the paranasal sinuses is rare. Here we report the case of an 11-year-old girl with no medical, surgical, or traumatic history, who presented for 1 month and progressive evolution of swelling of the left cheek, associated with pain, nasal obstruction, rhinorrhea, and a slight weight loss not quantified.

Saphenous Nerve Schwannoma: A Rare Differential Diagnosis of Knee Pain in Children.

Schwannomas are uncommon benign tumors of the peripheral nerves with a low risk of malignant transformation. They rarely affect children, can affect any part of the body but rarely occur in the lower extremity and typically present with a palpable mass, pain or neurological signs. Imaging helps to orient the diagnosis and anatomopathological examination helps to confirm it.

Lemmel syndrome: an unusual cause of biliary obstruction secondary to a duodenal juxta-ampullary diverticulum: a report of two cases.

abdominal pain or jaundice. Cross-sectional imaging is beneficial in making the diagnosis noninvasively, thus eliminating other pathologies of the peri-ampullary region. We present 2 cases of Lemmel's syndrome whose diagnosis is retained based on a CT scan and magnetic resonance cholangiopancreatography.

Primary amenorrhea secondary to imperforate hymen.

Hymen imperforation is uncommon. Symptoms include primary amenorrhea, cyclical lower abdominal pain, and rarely a pelvic mass syndrome. Delayed discovery may lead to endometriosis and infertility.

Vein of Galen aneurysmal malformation presenting as severe heart failure in a neonate.

The vein of Galen aneurysmal malformation (VGAM) is a rare cerebral arteriovenous malformation that can be life-threatening if not diagnosed and treated early. VGAM usually presents in the neonatal period with high-output cardiac failure. We report the case of a full-term male neonate who presented with respiratory distress, and a fontanel bruit soon after birth.