Leber's Hereditary Optic Neuropathy with Retinal Hemorrhage.

Leber's hereditary optic neuropathy (LHON) causes subacute visual loss, and, in the acute phase, the optic disc shows hyperemia, peripapillary telangiectasia, and swelling of the retinal nerve fiber layer (RNFL). Rarely, retinal hemorrhage may be present. In this study, we investigated LHON cases with retinal hemorrhage in the acute phase. Among 82 cases (164 eyes) of LHON who visited the Inoue Eye Hospital, retinal hemorrhage was observed in 5 cases (5 eyes). The age at onset was 36 (27-46) years, with 4 male cases. Mitochondrial DNA analysis revealed the presence of the m.11778G > A variant in four patients and the m.14484T > C variant in one patient. There was no medical history and no excessive smoking or alcohol consumption in any of the cases. In all cases, retinal hemorrhages were observed in the RNFL, accompanying the characteristic optic disc findings of LHON. Fluorescein angiography performed in three cases showed no leakage from the optic disc or blood vessels. While rare, the presence of retinal hemorrhage along the RNFL during the acute phase of LHON should be recognized, as it may warrant consideration of alternative diagnoses.