Chronic Subdural Hematoma Associated With Arachnoid Cyst

• DOI: 10.2176/nmc.52.113
• Publication Date: 2012-02-24T06:09:53Z
• Authors: Takeshi TAKAYASU; Kunyu HARADA; Shigeru NISHIMURA; Jun ONDA; Tohru NISHI; Hisashi TAKAGAKI
• Keywords: Male; Subdural Space; Decompression, Surgical; 3. Good health; Arachnoid Cysts; 03 medical and health sciences; Treatment Outcome; 0302 clinical medicine; Child, Preschool; Head Injuries, Closed; Hematoma, Subdural, Chronic; Humans; Accidental Falls; Arachnoid; Child; Craniotomy

Arachnoid cysts are well known to induce chronic subdural hematoma (CSDH) after head injury. However, histological observations of the arachnoid cyst and hematoma membrane have only been rarely described. An 8-year-old boy and a 3-year-old boy presented with CSDH associated with arachnoid cyst. Surgical removal of the hematoma and biopsy of the hematoma membrane and cyst wall were performed. Clinical courses were good and without recurrence more than 1.5 years after surgery. Histological examination suggested that the cysts did not contribute to hematoma development. Pediatric hematoma membranes, similar to adult hematoma membranes, are key in the growth of CSDH. Therefore, simple hematoma evacuation is adequate as a first operation for CSDH associated with arachnoid cyst.