| intradural-extramedullary mass | <radiology> Meniscus sign, neurofibroma / schwannoma, meningioma, drop metastasis, lipoma, dermoid, angioma, ependymoma of filum terminale (really intramedullary) (12 Dec 1998) |
|---|---|
| intradural | <anatomy> Beneath the dura mater. (16 Dec 1997) |
| haematopoiesis, extramedullary | The formation and development of blood cells outside the bone marrow, as in the spleen, liver, or lymph nodes. (12 Dec 1998) |
| extramedullary | Outside of, or unrelated to, any medulla, especially the medulla oblongata. (05 Mar 2000) |