Meningioma with pseudoglandular pattern. A case report.
A falx meningioma in an 11-year-old girl had a hemangiopericytomatous and papillary pattern, but the dominant histologic feature was a pseudoglandular arrangement of the tumor cells, closely imitating an adenocarcinoma. The gland-like spaces resulted mainly from dissolution of the centers of cell nests, and to a lesser extent from the fusion of papillary processes. The tumor-recurred locally five years after surgery and maintained its pseudoglandular pattern. Recognition of the existence of a pseudoglandular variant of meningiomas can prevent the mistaken diagnosis of a metastatic adenocarcinoma and other similar tumors.
D002648:Child; D005260:Female; D006801:Humans; D008577:Meningeal Neoplasms / Q000175:diagnosis / Q000648:ultrastructure*; D008579:Meningioma / Q000175:diagnosis / Q000648:ultrastructure*