Intra- and extracerebral arachnoid cyst. An atypical roentgenographic presentation.
Arachnoid cysts present in a variety of ways, and the preoperative diagnosis usually requires a high degree of suspicion. Bony changes consistent with a chronic focal mass effect, a relative paucity of clinical findings compared to the size of the lesion, and an extracerebral mass with an intracerebral component suggest the possibility. We present a case in which there appears to be a large, deep intracerebral mass associated with an extracerebral expansion.
D000328:Adult; D001099:Arachnoid / Q000000981:diagnostic imaging*; D001927:Brain Diseases / Q000000981:diagnostic imaging; D002493:Central Nervous System Diseases / Q000000981:diagnostic imaging; D003560:Cysts / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011859:Radiography