Nevus of Ota with midface tumors and a vanishing orbital mass.

Nevus of Ota, also known as oculodermal melanocytosis, is a benign melanocytic lesion that develops along the distribution of the V1 and V2 branches of the trigeminal nerve. Prior reports have described the typical imaging and clinical features of nevus of Ota. We present a rare case of a 31 year-old female with midface tumors and presumed hemorrhage into an orbital lesion in the setting of nevus of Ota resulting in acute loss of vision. • Nevus of Ota can be associated with midface tumors in the distribution of the V1 and V2 branches of cranial nerve V • Melanocytic lesions such as those with nevus of Ota can have intralesional hemorrhage which affects imaging characteristics • Due to risk of malignant transformation, patients with nevus of Ota should be closely monitored [ABSTRACT FROM AUTHOR]