Huge extracranial asymptomatic frontal invasive meningioma: a case report

Abstract

Meningioma is a well-recognized tumor of the central nervous system, but it rarely appears as an extracranial tumor secondarily extended into the paranasal sinuses. Meningiomas arise from arachnoid cap cells that form the external membrane of the brain. Most meningiomas are slow growing and are usually not associated with substantial underlying brain edema; they cause symptoms by the compression of adjacent neural structures. An interesting natural history of a neglected meningioma with extracranial extension is described. The diagnosis of meningioma was established by CT imaging, finally based on the histopathology and immunochemistry. The meningioma cells in our male patient were positive for progesterone receptors. The patient underwent surgical treatment and recovered without complications. On follow-up 1 year later there were no signs of process expansion.

An ectocranial lesion on the middle Pleistocene human cranium from Hulu Cave, Nanjing, China

“…They are therefore of intracranial origin, such that the tumor primarily affects the internal table by pressure atrophy or by direct invasion and erosion. In the rare cases in which they are sufficiently extensive, the meningioma may become intraosseus (or intradiploic), extend onto the external surface of the cranial vault (Cirak et al, 2000;Agrawal et al, 2007;Jovanovic et al, 2006), or into the paranasal sinuses (Swain et al, 2001), especially if untreated for extended periods of time (Michalik et al, 2006). In cases in which they are intradiploic, they may displace the external table outward, producing abnormalities of the external subpericranial bones.…”

Antemortem trauma and survival in the late Middle Pleistocene human cranium from Maba, South China

“…Meningiomas arise from the dura mater, are intracranial in origin, and primarily affect the internal table by pressure atrophy or by direct invasion and erosion. Rarely a meningioma may become intradiploic, extend onto the external surface, and displace the external table outward (30)(31)(32). Hemangiomas are benign, solitary tumors formed by proliferating blood vessels (33) that are rarely found in the cranium (34,35); the lesion originates in the diploë and can erode through either table.…”

Giant Parapharyngeal Schwannoma With A Massive Endocranial Extension

“…Although parapharyngeal schwannoma are not common [ 4 ], the tumors with these size and such location could be considered as very rare lesions. The tumors with extracranial extension usually present as asymptomatic mass and often grow to a considerable size before the disease become obvious or clinical detactable [ 5 ]. Nevertheless there is no specific sign or symptom that identifies a neurogenic tumor of the parapharyngeal space.…”