髄外発育を示した脊髄髄内腫瘍の検討

Spinal Intramedullary Tumor with Exophytic Growth

I．はじめに

　脊髄髄内腫瘍はその放射線学的特徴として，紡錘状の脊髄腫大像を呈することが知られている^6）が，中には髄外発育を呈し，あたかも脊髄硬膜内髄外腫瘍の如き放射線学的特徴を示す場合がある．われわれは昭和56年以来過去5年間に22例の脊髄髄内腫瘍を経験したが，うち5例23％に腫瘍の髄外発育を認めたので，その臨床症状・神経放射線学的特徴につき検討した．

We experienced 22 cases of spinal intramedullary tumor, in which 5 cases were accompanied with ex-ophytic growth. We discussed their clinical and radiolo-gical features, and therapeutic problems.

Concerning the locations of tumors with exophytic growth, the most common site was conus medullaris,accounting for 60% (3 cases). Histpathological findings were astrocytoma in two cases, and in one case, mixed glioma, ependymoma and hemangioblastoma. In neuro-logical observation, the most common initial symptom was back pain and lumbago, suggesting root pain.