Intradiploic Encephalocele at the Parietal Bone: A Case Report and Literature Review

Abstract

Intradiploic encephalocele is a rare condition of herniation of the brain parenchyma through the diploic space. A 52-year-old man presented with a parietal intradiploic encephalocele manifesting as an intermittent headache for 7 months. CT revealed an osteolytic lesion involving the right parietal bone. MRI demonstrated brain herniation within the diploic space. Surgery may be unnecessary in the absence of concurrent symptoms or neurological deficits. After 2 years of follow-up, symptoms were improved without neurological deficits and CT findings. We report the X-ray, CT, and MRI findings of an extremely rare case of parietal intradiploic encephalocele in adulthood.

Calvarial angiomatous meningioma developed in the diploe

“…Although the diploe can be affected by varying pathologies, intradiploic meningioma has been rarely reported. [1][2][3][4][5][6][7][11][12][13][14][15][16][17][18][19][20][21][22][23][24]26] Furthermore, cerebral angiomatous meningioma is known to be a rare subtype of low-grade meningioma. [9,25] In the present patient, the intradiploic tumor showed a lobular structure on MRI, with intense enhancement of the surrounding dura mater.…”

“…[8,13] e diploe can be affected by various pathologies, such as bone cysts, encephaloceles, arachnoid cysts, lipomas, teratomas, dermoid, epidermoid, cavernous hemangiomas, metastatic tumors, neurofibromas, and meningiomas. [1][2][3][4][5][6][7][11][12][13][14][15][16][17][18][19][20][21][22][23][24]26] Intradiploic meningioma is an infrequent but distinct entity that commonly develops as a benign tumor. [1,2,[4][5][6][7]10,12,[16][17][18]20,21,26] Angiomatous meningioma is a rare subtype of the World Health Organization Grade I meningioma, characterized by tumor cells consistent with low-grade meningioma and prominent microvessels of varying sizes.…”