Peritoneal metastasis of a cerebellar medulloblastoma through a ventriculoperitoneal shunt: A case report.

Medulloblastoma is a frequent and aggressive pediatric tumor. It causes intracranial hypertension, necessitating ventriculoperitoneal shunting with surgical resection. Intraperitoneal metastases are rare and result from the migration of neoplastic cells through the shunt and into the peritoneal cavity. This metastatic form involving the ventriculoperitoneal shunt has a poor prognosis, making therapeutic management even more difficult. We report the case of a 14-year-old boy with a history of medulloblastoma of the cerebellum who was initially treated with complete resection of the tumor with placement of a ventriculoperitoneal shunt, followed by radiotherapy and chemotherapy, with good progression until he presented to the emergency department with acute abdominal symptoms. Imaging revealed multiple peritoneal masses with intra- and retroperitoneal lymphadenopathies. An ultrasound-guided biopsy revealed a metastatic medulloblastoma in the peritoneal cavity, and the patient underwent chemotherapy. The placement of the ventriculoperitoneal shunt in the tumor dissemination is therefore to blame.

Pneumosinus dilatans with shift of midline intracranial structures: A case report.

Pneumosinus dilatans (PSD) is an abnormal dilatation and enlargement of one or more paranasal sinuses, extending beyond the anatomic bony boundaries, without defect or thinning of its bony walls. It is documented by only a few reports. Usually asymptomatic, it is in general found incidentally on imaging. It is important for radiologists to recognize the diagnosis and rule out eventual associated conditions such as meningiomas, orbital tumors, arachnoid cysts, and fibrous dysplasia. We report the case of PSD diagnosed incidentally in a 51-year-old female patient who presented to the emergency department with confusion.

Ortner's syndrome secondary to a thoracic thrombosed aortic aneurysm: Case report.

Ortner's syndrome refers to vocal cord paralysis resulting from compression of the left recurrent laryngeal nerve by abnormal mediastinal vascular structures. We present a case of an 89-year-old man who was an active smoker, with a clinical history of hypertension, who presented hoarseness of voice with chronic evolution. Neck and Thoracoabdominal CT angiography was performed revealing a thrombosed aneurysm of the aortic arch.