Angiomatous meningioma with cystic degeneration: A case report.

Angiomatous meningioma (AM) is an uncommon type of meningioma, with cystic degeneration being even rarer. Typically, the imaging features of AM include solid masses with severe peritumoral edema, and the presence of 'root like' vascular flow void shadows within them during magnetic resonance imaging (MRI) enhancement. The present study reports the case of a 58-year-old male who came to seek medical attention mainly due to a bilateral frontal distending headache that had persisted for 18 days and was gradually worsening. Unlike in other patients with typical AM, the imaging examination of this patient showed that the solid component of the tumor accounted for a smaller proportion of the total lesion volume; the lesion was predominantly composed of cystic components, with no obvious severe edema around the tumor. An enhanced MRI scan did not show any characteristic vascular flow voids. During the surgery, the surgeon separated the solid part of the tumor from the dura mater, cut off the tumor's blood supply artery, extracted a portion of the cystic fluid for decompression and completely removed the tumor. The postoperative pathology confirmed that the tumor was an AM. The present case report describes the rare imaging manifestation of cystic AM, and analyzes it in conjunction with other related studies on AM. New diagnostic references are provided for patients with similar imaging manifestations, and practical diagnostic and treatment experience are also provided for the treatment of AM with concurrent cystic degeneration in the future.