Arachnoid cysts are collections of cerebrospinal fluid within the arachnoid membrane. They are benign, congenital lesions, and are usually asymptomatic. Rarely, they may become acutely symptomatic, due to cyst enlargement, subdural or the presence of the intracystic hemorrhage.

The association between arachnoid cyst and subdural hematoma (SH) is rare. Typically develops after minor head injury. Spontaneous bleeding has been reported in the literature. Treatment is usually surgery of the bleeding and cysts. There is only a few studies that resolved spontaneously bleeding.

Our case with normal neurological examination was treated symptomatically without surgical intervention and SH was resolved spontaneously.

In this study, spontaneous bleeding and also spontaneous resorbsion at the same patient was reported.