![]() ![]() However, she did report back and was finally lost to follow-up.īear track dystrophy is a rare condition forming part of the disorder known as the grouped CHRPE. There was really no doubt in the diagnosis, however this being such an unique case we decided to subject the patient to some more tests like a fundus fluorescein angiography (FFA), an optical coherence tomography (OCT), an ultrasound b scan (USG B scan) as well as a detailed visual field analysis, for which she was also given an appointment for the very next day. However no such retinal findings were detected in them. The patient's siblings, as well as parents, were also subjected to an extensive fundus examination. The rest of the fundus including the optic disc was normal.įigure 1: Fundus photograph-right eye - multiple hyperpigmented, flat clearly demarcated patches resembling animal foot printsįigure 2: (a and b) Fundus photograph-right eye - hyperpigmented lesions seen to be more in number and size in the peripheral retinaįigure 3: Fundus photograph-left eye - similar hyperpigmented lesions seen in the left eye alsoįigure 4: Fundus photograph-left eye - in the left eye to the hyperpigmented lesions were more in number and size in the peripheral retina A similar picture was seen in the left eye too and. These were more in number and size in the peripheral retina a and b. The picture in the right eye revealed multiple hyperpigmented, flat, clearly demarcated patches resembling animal foot prints. A provisional diagnosis of congenital hypertrophy of the retinal pigment epithelium (CHRPE) both eyes was made and the patient was subjected to a fundus photography to further confirm the diagnosis. Similar findings were seen in both her eyes. These were smaller around the optic disc and gradually became larger in size towards the periphery. However, a dilated fundoscopy revealed multiple, segmentally oriented, distinct, well demarcated, flat, hyper pigmented, greyish black lesions in the retina. The visual fields (confrontation method) and the color vision, evaluated using an Ishihara chart, too were normal. The anterior segment findings too were well within normal limits. Her vision was a normal 6/6 in both eyes. Since CHRPE, in itself is a totally benign condition with no associated ocular or systemic complications, it becomes that much more important to distinguish it from the more serious vision/life threatening conditions like choroidal melanoma as well as from the other pigmented ocular fundus lesions (POFL's) associated with familial cancer syndromes like familial adenomatous polyposis (FAP).Ī 41-year-old lady, reported for a routine eye examination for the very 1 st time, without having any obvious ocular/systemic signs or symptoms. The main differential diagnosis of CHRPE includes choroidal naevus, choroidal melanoma, chorioretinal scar, subretinal haematoma, pigmented epiretinal membrane, and reactive retinal pigment epithelial hyperplasia. This disorder is usually without any functional consequence with patients typically having a normal vision, color vision, normal visual fields, dark adaptation, electroretinography, and electrooculography findings. Available from: īear track dystrophy, is a rare condition, which forms part of the disorder known as the grouped congenital hypertrophy of the retinal pigment epithelium (CHRPE), a peculiar congenital anomaly of the retinal pigment epithelium (RPE) diagnosed by its characteristic ophthalmoscopic appearance. An interesting case of "bear track dystrophy". How to cite this URL: Mishra A, Aggarwal S, Shah S, Negi P. ![]() How to cite this article: Mishra A, Aggarwal S, Shah S, Negi P. ![]() Keywords: Choroidal melanoma, congenital hypertrophy of the retinal pigment epithelium, normal vision, pigmented ocular fundus lesions Since CHRPE, in itself is a totally benign condition with no associated ocular or systemic complications, it becomes that much more important to distinguish it from the more serious vision/life-threatening conditions like choroidal melanoma as well as from the other pigmented ocular fundus lesions associated with familial cancer syndromes like familial adenomatous polyposis. The main differential diagnosis of CHRPE includes choroidal naevus, choroidal melanoma, chorioretinal scar, subretinal hematoma, pigmented epiretinal membrane, and reactive retinal pigment epithelial hyperplasia. Bear track dystrophy, is a rare condition, which forms part of the disorder known as the grouped congenital hypertrophy of the retinal pigment epithelium (CHRPE), a peculiar congenital anomaly of the retinal pigment epithelium diagnosed by its characteristic ophthalmoscopic appearance. ![]()
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