Primary Orbital Meningioma

Orbitozygomatic Resection of Meningiomas of the Orbit

“…However, there are few reports in the literature regarding orbital meningiomas. 14–21 Thus, optimal treatment has not been defined in any large series of patients. It seems, however, that surgical resection through broad field exposure followed by precise three‐dimensional orbital wall reconstruction is most widely accepted in the treatment of this entity.…”

Orbitozygomatic Resection of Meningiomas of the Orbit

“…However, there are few reports in the literature regarding orbital meningiomas. 14–21 Thus, optimal treatment has not been defined in any large series of patients. It seems, however, that surgical resection through broad field exposure followed by precise three‐dimensional orbital wall reconstruction is most widely accepted in the treatment of this entity.…”

Tumors of the optic nerve

“…Fibroblastic meningiomas, composed only of spindle cells, are almost unheard of in the orbit, especially with respect to tumors originating from the sheaths of the optic nerve. Fibroblastic 'meningiomas' occurring more peripherally in the orbit may well be other orbital tumors, such as Schwann cell or fibrohistiocytic tumors (Craig & Gogela, 1949;MacMichael & Cullen, 1969;D'Alena, 1964). The reticulin stain discloses no fibers among meningioma tumor cells.…”

“…In the peripheral orbital space, it is theoretically possible for the leptomeninges to herniate through a bony foramen in the course of embryogenesis, or for meningiothelial ceils to be trapped in the dural contribution to the development of the periorbita. Peripheral orbital tumors have been described as fibroblastic, which raises questions about their authenticity (Craig & Gogela, 1949;MacMichael & Cullen, 1969, D'Alena, 1964. Although the neural crest gives rise to much of the orbital mesenchyme as well as to the orbital leptomeninges, there is presently no evidence for the mutability of neurogenic and mesenchymal phenotypes beyond the earliest period of embryogenesis.…”

“…Two variants of primary intra-orbital meningloma infrequently occur (Craig & Gogela, 1949;Mandelhorn & Shea, 1971;MacMichael & Cullen, 1969;D'Alena, 1964): those that derive from ectopic arachnoidal cells within the muscle cone, unattached to the optic nerve or orbital wall, and those that appear to derive from the periorbita of the orbital walls. While the former indisputably occur, the latter are of questionable authenticity, except in rare cases (Tan & Lim, 1965).…”

Orbitozygomatic Resection of Meningiomas of the Orbit

“…However, there are few reports in the literature regarding orbital meningiomas. 14–21 Thus, optimal treatment has not been defined in any large series of patients. It seems, however, that surgical resection through broad field exposure followed by precise three‐dimensional orbital wall reconstruction is most widely accepted in the treatment of this entity.…”

Tumors of the optic nerve

“…Fibroblastic meningiomas, composed only of spindle cells, are almost unheard of in the orbit, especially with respect to tumors originating from the sheaths of the optic nerve. Fibroblastic 'meningiomas' occurring more peripherally in the orbit may well be other orbital tumors, such as Schwann cell or fibrohistiocytic tumors (Craig & Gogela, 1949;MacMichael & Cullen, 1969;D'Alena, 1964). The reticulin stain discloses no fibers among meningioma tumor cells.…”

“…In the peripheral orbital space, it is theoretically possible for the leptomeninges to herniate through a bony foramen in the course of embryogenesis, or for meningiothelial ceils to be trapped in the dural contribution to the development of the periorbita. Peripheral orbital tumors have been described as fibroblastic, which raises questions about their authenticity (Craig & Gogela, 1949;MacMichael & Cullen, 1969, D'Alena, 1964. Although the neural crest gives rise to much of the orbital mesenchyme as well as to the orbital leptomeninges, there is presently no evidence for the mutability of neurogenic and mesenchymal phenotypes beyond the earliest period of embryogenesis.…”

“…Two variants of primary intra-orbital meningloma infrequently occur (Craig & Gogela, 1949;Mandelhorn & Shea, 1971;MacMichael & Cullen, 1969;D'Alena, 1964): those that derive from ectopic arachnoidal cells within the muscle cone, unattached to the optic nerve or orbital wall, and those that appear to derive from the periorbita of the orbital walls. While the former indisputably occur, the latter are of questionable authenticity, except in rare cases (Tan & Lim, 1965).…”

Orbitozygomatic Resection of Meningiomas of the Orbit

“…However, there are few reports in the literature regarding orbital meningiomas. 14–21 Thus, optimal treatment has not been defined in any large series of patients. It seems, however, that surgical resection through broad field exposure followed by precise three‐dimensional orbital wall reconstruction is most widely accepted in the treatment of this entity.…”

Tumors of the optic nerve

“…Fibroblastic meningiomas, composed only of spindle cells, are almost unheard of in the orbit, especially with respect to tumors originating from the sheaths of the optic nerve. Fibroblastic 'meningiomas' occurring more peripherally in the orbit may well be other orbital tumors, such as Schwann cell or fibrohistiocytic tumors (Craig & Gogela, 1949;MacMichael & Cullen, 1969;D'Alena, 1964). The reticulin stain discloses no fibers among meningioma tumor cells.…”

“…In the peripheral orbital space, it is theoretically possible for the leptomeninges to herniate through a bony foramen in the course of embryogenesis, or for meningiothelial ceils to be trapped in the dural contribution to the development of the periorbita. Peripheral orbital tumors have been described as fibroblastic, which raises questions about their authenticity (Craig & Gogela, 1949;MacMichael & Cullen, 1969, D'Alena, 1964. Although the neural crest gives rise to much of the orbital mesenchyme as well as to the orbital leptomeninges, there is presently no evidence for the mutability of neurogenic and mesenchymal phenotypes beyond the earliest period of embryogenesis.…”

“…Two variants of primary intra-orbital meningloma infrequently occur (Craig & Gogela, 1949;Mandelhorn & Shea, 1971;MacMichael & Cullen, 1969;D'Alena, 1964): those that derive from ectopic arachnoidal cells within the muscle cone, unattached to the optic nerve or orbital wall, and those that appear to derive from the periorbita of the orbital walls. While the former indisputably occur, the latter are of questionable authenticity, except in rare cases (Tan & Lim, 1965).…”