A case report of melanocytoma of optic disc and literature review
Melanocytoma of optic disc(MCOD)is a rare clinical disease,which is easily confused with choroidal melanoma,and the treatment methods of the two are completely different.MCOD is a benign disease with the possibility of malignant transformation,so it is very important to distinguish it from malignant diseases and find malignant transformation of tumors in time for follow-up treatment.This paper reported a large case of MCOD in the right eye,with a best corrected visual acuity of 20/20,and an oval-shaped black mass with unclear borders and feathery appearance in the optic disc area of the right eye on fundus photography.Ocular type B-ultrasonic showed a dome-shaped bulge mass lesion on the optic disc of the right eye;arcuate defect of visual field;optical coherence tomography showed thinning of the ganglion cell layer in the right eye.Optical coherence tomography angiography showed increased blood flow density in the right eye and choroidal blood flow defects.The diagnosis was considered to be MCOD,and no intervention treatment is carried out,and after four months of observation and follow-up,the patient's tumor have no obvious change,and the patient is asked to recheck regularly every year.The results of analysis and examination showed that the area of arcuate visual field defect was consistent with the thinning area of ganglion cells in the affected eye,and was correlated with choroidal blood flow defect and increased vascular density in retinal macular area.By summarizing the medical records and reviewing the literature research,the diagnosis basis was provided for clinical doctors.
Melanocytoma of optic discOptical coherence tomography angiographyVisual field defectsVascular densityGanglion cells