Intracranial hypertension in a slim young male

A 25 year old male engineering student reported to the neurological emergency department with two weeks' history of exercise-exacerbated loss of vision. At the beginning, he had noticed sudden darkening of vision when playing soccer. Episodes of vision loss had gradually increased in frequency, and now occurred even with mild physical exercise or change of posture many times per day. He did not complain of headaches at any point, and there was no double vision. Clinical examination revealed bilateral visual acuity of 0.5 c.c. Ophthalmoscopy showed marked bilateral papillary edema. Examination of this slim (BMI 1…