Intradiploic Meningioma in the Lateral Orbital Wall: A Case Report

Abstract

Orbital wall tumor and intradiploic meningioma are rare tumors. Magnetic resonance imaging and nuclear medicine findings in the cases of orbital intradiploic meningioma have rarely been reported. A 46-year-old man presented with gradually appearing exophthalmos. MR and nuclear medicine findings revealed intradiploic tumor on the lateral orbital wall. The patient underwent total tumor resection and final pathological diagnosis was benign meningioma. This case highlights the importance of pathological conformation before performing extensive surgery. Thallium single-photon emission computed tomography is a valuable technique for distinguishing intradiploic benign meningioma from other malignant tumors.

Orbital roof intradiploic meningioma in a 16-year-old girl

“…They can originate from subcutaneous tissue of skin, paranasal sinus, orbit, neck, salivary gland, calvaria and along per neural sheath of cranial nerves. [ 1 2 7 ] Winkler in 1904 first described a meningioma originating from extradural location. [ 8 ] Extradural meningioma arising in the skull is usually referred as intraosseous, calvarial or intradiploic.…”

“…Radiographically, X-ray can delineate location and its chronic pressure effect on surrounding bone. [ 2 3 5 6 7 8 10 11 ] It shows generally osteoplastic or hyperostosis reaction in the form of granular or speckled calcification which involves roof or wall of the orbit. Radiologically intradiploic meningiomas are typically either osteoplastic or osteolytic, however, mixed versions also have been reported although the majority are osteoblastic, extremely rarely are osteolytic or very extremely have a mixed pattern.…”

“…Histopathology of previously reported five cases were the psammomatous meningioma with one cases each of transitional, transitional with psammomatous body, and meningothelial meningioma. [ 6 7 ]…”

Primary extradural meningioma of posterior fossa associated with acquired chiari malformation: A short review

“…[ 4 5 6 7 ] In the past, PEM was also termed as intraosseous, diploic, cutaneous, ectopic, or extra calvarial meningioma. [ 2 3 7 8 ] In 1904, Winkler first described a meningioma originating from extradural location. [ 8 ] Till date, only four cases of PEM occurring in occipital intradiploic is reported.…”

“…[ 2 3 7 8 ] In 1904, Winkler first described a meningioma originating from extradural location. [ 8 ] Till date, only four cases of PEM occurring in occipital intradiploic is reported. [ 4 6 7 9 ] [ Table 1 ] Authors present 40-year-old male, who had primary extradural posterior fossa meningioma, was surgically managed successfully.…”