Noriyuki Nishi

Giant frontal mucocele extending into the anterior cranial fossa.

The authors report a patient with a huge frontal mucocele presenting with transient left hemiparesis. Magnetic resonance imaging and computed tomography showed the huge frontal mucocele arising from the frontal sinus extending to the anterior cranial fo ssa. Right middle cerebral artery stenosis was seen on the carotid angiography. The mucocele was treated with Killians surgery. On the postoperative seventh day, the patient showed massive cerebrospinal fluid leakage that ceased with conservative management. The patient was discharged from the hospital without any neurological deficit. We discuss the clinical symptoms and postoperative course of the huge frontal mucocele with intracranial extension.

Brain metastases from urachal carcinoma

We present a case of brain metastases of the urachal carcinoma, which is extremely rare and malignant. Contrast-enhanced MRI was employed to detect them. A large mass was removed surgically and 4 other small metastases were treated by gamma knife radiosurgery. Six weeks after radiosurgery, the 4 lesions had disappeared on MRI. We emphasise the importance of early diagnosis using MRI and treatment by radiosurgery for this rare condition.

A patient with cavernous sinus cavernoma who was difficult to diagnose by imaging modalities

Cavernous Sinus Cavernous Hemangioma (CSCH) is a relatively rare vascular lesion, accounting for 0.4-2.0% of tumors of the cavernous sinus. Due to multiple differential diagnoses, a diagnosis based on pre-operative imaging is very important. This case report describes a patient with CSCH in whom it was difficult to determine a pre-operative diagnosis based on imaging modalities.