脊髄長大病変―視神経脊髄炎関連疾患，HTLV-1関連脊髄症と脊髄硬膜動静脈瘻

Imaging spectrum of spinal diseases：neuromyelitis optica spectrum disorder（NMOSD）, human T-cell lymphotrophic virus associated myelopathy（HAM）and dural artetiovenous fistula（dAVF）

現病歴：症例は60歳代，女性。頸部から下肢に至るしびれ，感覚鈍磨および下肢の筋力低下を主訴に近医を受診した。脊髄炎が疑われるも確定診断に至らず，精査加療目的に当院紹介となった。

We often encounter various spinal diseases in a daily clinical work. It is sometimes difficult to make a correct diagnosis, due to their non-specific imaging findings. Since spinal cord is thin and surrounded by narrow bony structure, the useful imaging modalities are relatively limited, compared to brain. Thus, it is critical to be familiar with the characteristic imaging findings of spinal cord diseases. Here, we present some cases of neuromyelitis optica spectrum disorder（NMOSD）, human T-cell lymphotrophic virus associated myelopathy（HAM）and spinal dural artetiovenous fistula（dAVF）and review some important characteristic imaging findings on MRI and CT. We hope it will help make a correct diagnosis for spinal diseases.