You're the flight surgeon: colloidal cyst of the third ventricle.
Serkowski
Richard J
RJ
D000337:Aerospace Medicine; D002551:Cerebral Ventricle Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D056364:Colloid Cysts / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D004244:Dizziness / Q000209:etiology; D006261:Headache / Q000209:etiology; D006801:Humans; D006849:Hydrocephalus / Q000150:complications / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D008889:Military Personnel; D019635:Neurosurgical Procedures