Pneumosinus dilatans.
D000328:Adult; D004106:Dilatation; D006801:Humans; D008297:Male; D010038:Otorhinolaryngologic Diseases / Q000000981:diagnostic imaging; D010256:Paranasal Sinuses / Q000000981:diagnostic imaging; D011859:Radiography; D012658:Sella Turcica / Q000000981:diagnostic imaging