title: A case of endolymphatic sac tumor with long-term survival.
abstract: A 72-year-old man developed left facial palsy at age 14 and left-sided hearing loss at age 20. At the age of 59, he presented with gait disturbance, and a large left cerebellopontine angle tumor was detected, which had markedly destroyed the pyramidal bone. The tumor was subtotally resected, but he required two more operations at the ages of 64 and 69 because of tumor regrowth. At the present time, recurrent tumor has destroyed the occipital bone and is invading the scalp. However, even though he has several cranial nerve palsies and cerebellar ataxia, he remains in stable condition and demonstrates long-term survival. The patient's surgical specimens revealed a papillary adenoma, which was recently thought to be of endolymphatic sac origin, although the origin of this kind of tumor, whether arising from the middle ear or from the endolymphatic sac, has not been established with certainty so far. In this paper, we provide further evidence that this tumor originates from the endolymphatic sac, based on anatomical, histopathological, and embryological evidence.
authors.affiliation: Department of Neurosurgery, Hirosaki University, School of Medicine, Aomori Prefecture, Japan. asanoken@cc.hirosaki-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Asano
authors.forename: T
authors.initials: T
authors.lastname: Sekiya
authors.forename: T
authors.initials: T
authors.lastname: Hatayama
authors.forename: M
authors.initials: M
authors.lastname: Tanaka
authors.forename: A
authors.initials: A
authors.lastname: Takemura
authors.forename: S
authors.initials: S
authors.lastname: Suzuki
authors.forename: O
authors.initials: O
authors.lastname: Kubo
authors.forename: Y
authors.initials: Y
authors.lastname: Ishihara
mesh_terms: D000236:Adenoma / Q000150:complications / Q000175:diagnosis / Q000473:pathology / Q000601:surgery / Q000628:therapy; D000293:Adolescent; D002524:Cerebellar Ataxia / Q000209:etiology; D002528:Cerebellar Neoplasms / Q000150:complications / Q000175:diagnosis / Q000473:pathology / Q000601:surgery / Q000628:therapy; D002530:Cerebellopontine Angle / Q000473:pathology / Q000601:surgery; D003131:Combined Modality Therapy; D003389:Cranial Nerve Diseases / Q000209:etiology; D003680:Deglutition Disorders / Q000209:etiology; D004428:Ear Neoplasms / Q000150:complications / Q000175:diagnosis / Q000473:pathology / Q000601:surgery / Q000628:therapy; D004621:Embolization, Therapeutic; D004712:Endolymphatic Sac / Q000473:pathology / Q000601:surgery; D005158:Facial Paralysis / Q000209:etiology; D005500:Follow-Up Studies; D034381:Hearing Loss / Q000209:etiology; D006319:Hearing Loss, Sensorineural / Q000209:etiology; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology / Q000601:surgery; D008297:Male; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local; D018365:Neoplasm, Residual; D010579:Petrous Bone / Q000473:pathology / Q000601:surgery; D012888:Skull Neoplasms / Q000150:complications / Q000175:diagnosis / Q000473:pathology / Q000601:surgery / Q000628:therapy; D014012:Tinnitus / Q000209:etiology; D017287:Ventriculoperitoneal Shunt