Yamamoto Y, Waga S
Surg Neurol. 1984 Sep;22(3):241-2. doi: 10.1016/0090-3019(84)90006-5.
A 50-year-old fisherman presented with numbness of the left hand and headache after a fall on the deck of a boat. Myelography revealed protrusions of the disks of C-7 and L-4. Computed tomography of the brain incidentally disclosed moderate hydrocephalus and hypoplasia of the inferior cerebellar vermis without cystic formation in the posterior fossa. The patient never developed evidence of cerebral involvement. Several entities associated with agenesis or hypoplasia of the cerebellar vermis have been described, all of which accompany abnormal clinical symptoms or signs attributable to cerebral involvement. This case is unique in that the patient has been entirely asymptomatic with this abnormality since birth.
一名50岁的渔民在船上甲板摔倒后出现左手麻木和头痛症状。脊髓造影显示C-7和L-4椎间盘突出。脑部计算机断层扫描偶然发现中度脑积水和小脑下蚓部发育不全，后颅窝无囊肿形成。该患者从未出现脑部受累的证据。已经描述了几种与小脑蚓部发育不全或发育异常相关的病症，所有这些病症都伴有可归因于脑部受累的异常临床症状或体征。该病例的独特之处在于，患者自出生以来一直没有出现与这种异常相关的任何症状。
