title: Cervical myelopathy caused by disc herniation at the segment of existing osteochondroma in a patient with hereditary multiple exostoses.
abstract: Hereditary multiple exostoses (HME) is a benign hereditary disorder characterized by multiple osteochondromas. Osteochondroma appears occasionally in the spinal column as a part of HME. A 37-year-old man presented with a history of HME and cervical compressive myelopathy caused by intraspinal osteochondroma arising from the lamina of the C5 and disc herniation at the C5-6. He was treated by open-door laminoplasty at the C5 and C6 with excision of the tumor. The neurological symptoms were immediately relieved after surgery. Magnetic resonance images demonstrated a sufficient decompression of the spinal cord with a spontaneous regression of the herniated disc at one year after surgery. There was no recurrence of the tumor and no appearance of kyphosis and segmental instability of the cervical spine on postoperative imaging studies for three years after surgery. The patient could be successfully treated by laminoplasty with excision of the tumor and without removal of the herniated disc.
authors.affiliation: Department of Orthopedic Surgery, Karatsu Red Cross Hospital, Karatsu, Japan.
authors.forename: Ko
authors.initials: K
authors.lastname: Ikuta
authors.affiliation: Department of Orthopedic Surgery, Kyushu University Beppu Hospital, Beppu, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Tarukado
authors.affiliation: Department of Orthopedic Surgery, Karatsu Red Cross Hospital, Karatsu, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Senba
authors.affiliation: Department of Orthopedic Surgery, Karatsu Red Cross Hospital, Karatsu, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kitamura
authors.affiliation: Department of Orthopedic Surgery, Karatsu Red Cross Hospital, Karatsu, Japan.
authors.forename: Norihiro
authors.initials: N
authors.lastname: Komiya
authors.affiliation: Department of Orthopedic Surgery, Karatsu Red Cross Hospital, Karatsu, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shidahara
keywords: Decompression; Hereditary multiple exostoses; Herniated disc; Osteochondroma; Regression