[Ossified chronic hematoma--one successful operated case (autlhor's transl)]

A case of ossified chronic subdural hematoma was reported. This patient was 56-year-old man, who suffered from mild head traumas two times in 1966 and 1969, and was a drinker. He suddenly complained of speech disturbance on May 17, 1972, and general convulsion with unconsciousness beginning from the right upper limb on May 21. Slight right hemiapresis and mental disturbance appeared gradually since then, and he was admitted to our hospital on August 15. After some examinations, total removal of the ossified cystic chronic subdural hematoma was performed on August 25. The post-operative course was almost good and he was discharged on September 21. Content of this chronic subdural hematoma was almost all old yellowish muddy substance, but while some fresh bleeding points were seen at the inner surface of the both outer and inner membrane. Microscopically, the definite bony formation and the development of capillaries in accordance with the fresh bleeding points were observed in the membranes. Adhesion between the inner membrane of the hematoma and the brain surface which related to the intracerebral hematoma was presented. From these findings, this case suggested some problems about the life cycle of chronic subdural hematoma. The ossified chronic subdural hematoma was discussed from the studies of 6 literature cases and our one case.