Peculiar geometric alopecia and trigeminal nerve dysfunction in a patient after Guglielmi detachable coil embolization of a ruptured aneurysm.

Neuroendovascular treatment is increasingly being used for treatment of intracranial aneurysms. Postradiation alopecia, commonly seen weeks after radiation for other diseases such as brain tumors, is rarely reported after neuroendovascular procedures for benign lesions because of their delayed manifestations. Although the morbidity and mortality is less compared with surgery, adverse effects related to radiation are probably understated, underreported, and/or often attributed to prolonged bed rest, heparinization, or poor nutrition. We present a case with a delayed onset of a graphic but peculiar geometric alopecia associated with trigeminal nerve pattern dysfunction, which was related to the fluoroscopic radiation for coil embolization of an anterior communicating artery aneurysm.