[A case of cleidocranial dysostosis associated with arachnoid cyst].

Cleidocranial dysostosis (CCD) is a rare congenital disorder characterized by the heredity, the disturbance of the ossification of the skull and clavicles, and dental anomaly. The entity of CCD was established by Marie and Sainton in 1898. In Japan about 150 cases have been reported since Haneda's first report in 1933. Recently we experienced a rare case of CCD associated with the temporal arachnoid cyst. The patient was a 61-year-old male who had suffered from mild spastic paresis of the left upper extremity since his childhood. One morning he suddenly noticed motor weakness of the left upper and lower extremities and was transferred to our hospital. On admission we observed the left hemiparesis (MMT 3/5), the left central type facial palsy, and the left long tract signs. Physical examination disclosed frontal bossing, depression of the forehead, sloped shoulders, cone-shaped thorax, and thoracic scoliosis. Plain skull radiograph showed persistent metopic suture and frontal fontanelle, many wormian bones around coronal and lambdoid sutures. Plain radiographs of the systemic bones also showed typical features of CCD such as dysplasia of the lateral third of the bilateral clavicles, deformities of the cervical vertebral bodies, thoracic scoliosis, and wide symphysis. CT scan disclosed the right putaminal hemorrhage, the right temporal arachnoid cyst, enlargement of the right middle fossa, thinning of the temporal bone adjacent to the arachnoid cyst. It also showed the atrophy of the right cerebral peduncle and midbrain. Surgical treatment was performed to remove the hematoma and release the cyst. Several neurological disorders associated with CCD have been reported such as epilepsy, mental retardation, spastic paresis etc.(ABSTRACT TRUNCATED AT 250 WORDS)