Spontaneous Focal Hemorrhage of Optic Disc in Peripapillary Hyperreflective Ovoid Mass-Like Structures.

Introduction: Spontaneous focal hemorrhage of optic disc in peripapillary hyperreflective ovoid mass-like structures (PHOMS) is rare. This study reports the image features of two cases of spontaneous hemorrhage of an optic disc in PHOMS.

Methods: Case 1: A 51-year-old woman complained of visual fatigue for 1 week. Small patchy hemorrhage was observed in the optic disc of the right eye. Case 2: A 17-year-old female presented with complaints of experiencing floaters in the left eye for a duration of 1 day. Small patchy hemorrhage was observed in the left optic disc. The patients underwent the color fundus photograph (CFP), fundus autofluorescence (FAF), spectral-domain optical coherence tomography (SD-OCT), optical coherence tomography angiography (OCTA), and Minimum intensity projection (Min-IP) images.

Results: Case 1: The right eye showed a small patchy hemorrhage of optic disc. PHOMS on SD-OCT of both eyes exhibited an ovoid shape and manifested as peripapillary hyperreflective bright regions on en-face Min-IP image, the active blood flow signal of PHOMS was detected on SD-OCT/OCTA and FAF revealed a hypofluorescent. The optic cup-to-disc (C/D) ratio of both eyes was 0.06, respectively. Case 2: Small patchy hemorrhage was observed in the left optic disc and FAF showed hypofluorescence. PHOMS on SD-OCT of the left eye showed an ovoid shape and manifested as peripapillary hyperreflective bright regions on en-face Min-IP image, the active blood flow signal of PHOMS was detected on SD-OCT/OCTA. C/D in the right eye was 0.4.

Conclusion: Spontaneous focal hemorrhage of optic disc may occur in PHOMS. The space-occupying effect of PHOMS may lead to compression of surrounding tissues, resulting in the optic disc congestion and a reduced C/D ratio, thereby involving the microvascular system of the optic disc.