Cutaneous Meningioma (Psammoma)

Primary Type I cutaneous meningioma of the scalp: Cytohistological and immunohistochemical features of a rare neoplasm

“…The first reported case of such neoplasm was in 1904,[ 6 ] though its first description was found in an article in the year 1956. [ 7 ] The rarity of these tumors may be appreciated by the fact that most of the documentation regarding such lesion is in the form of case reports. The classification system was introduced in the year 1974 by Lopez et al ., in a large report.…”

Imaging Features of Extra Cranial Parapharyngeal Space Meningioma: Case Report

“…Few authors [8] stated that subcutaneous meningiomas arise from the schwann cells because of the similarity between the cells of meningocytic meningioma and nevus cells which are derived from schwann cells [9]. …”

An Intradiploic Meningioma of the Orbital Roof: Case Report

“…There have been published cases of cutaneous meningiomas [2], intraosseous [1], cerebral ventricular [7], paranasal si nus-ethmoidal [6], frontal [8], maxillary meningiomas [9] and, with regard more par ticularly to the orbit, meningiomas starting in the extrinsic ocular muscles [5], in the orbital wall [1,4],chiefly in the roof [11] but even anteriorly under the lacrimal caruncle or in the conjunctiva [5], Our case, once an orbital origin has been excluded, could have arisen from the frontal sinus. But, since the anterior portion of the frontal bone, where the bone flap was cut, was not involved in the tumor, for on re moval of the entire tumor it was not neces sary to reach the anterior margin of the orbital roof, and since, thirdly, a postopera tive X-ray showed that the sinus was per fectly intact, it seems reasonable to exclude an origin of this kind and to consider as causally unrelated the meningioma and the sinus hypoplasia, the latter being anyway a fairly frequent finding.…”