#Bear tracks retina fap series

The majority of solitary CHRPE show slightly increased diameter, as observed in 74% to 83% of cases followed >5 years in two reported series ( 2, 6). Both solitary lesions and 'bear tracks' are. They can occasionally be seen in a grouped configuration resembling the footprint of an animal, or 'bear tracks,' as is seen in this photo. The lacunae show enlargement in 32% of cases after a mean follow-up of 5 years ( 2). Congenital hypertrophy of the retinal pigmented epithelium (CHRPE) lesions are typically solitary, flat, well-demarcated, hyperpigmented lesions of the retina. Most solitary CHRPE lesions have a typical depigmented ring or “halo” around the margin. It is commonly seen in patients with familial adenomatous polyposis (FAP). The condition is benign, although it may cause small visual field defects. The bear tracks (dark blotches) are due to congenital hypertrophy of the retinal pigment epithelium (CHRPE). Congenital hypertrophy of the RPE (CHRPE) is a condition that results in an overgrowth of the RPE. Bear tracks on the retina of the eye, ophthalmoscope image. The retinal pigment epithelium (RPE) is a layer of cells in the retina that nourish the retina and help to remove its waste products. Well-defined depigmented foci, called lacunae, are present in 43% of the pigmented CHRPE. The retina is a thin layer of tissue at the back of the eye that senses light and sends images to the brain. The median largest basal diameter is 4.5 mm. The lesion is predominately pigmented in 88% and nonpigmented in 12% of cases. Only 2% are found in the macular or peripapillary region. Disordered development of the retina and retinal pigment epithelium may result in diffuse retinal abnormalities or focal lesions in one or both eyes. multifocal (bear tracks) and those showing systemic.

The site and size of CHRPE lesions were documented. It usually lacks halos, occupies one quadrant, and is comprised of smaller lesions than classic CHRPE and FAP-associated CHRPE. As mentioned earlier, most are located in the midperipheral or peripheral fundus. The retina of 17 diagnosed FAP patients and 13 individuals at risk were examined. Grouped Pigmentation of the Retina is another CHRPE variant made up of multiple lesions, giving it the appearance of animal tracks and the nickname bear tracks. It appears clinically as a well-demarcated flat to minimally elevated fundus plaque that can range from a black homogeneous lesion to a completely depigmented lesion ( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16). A review of 330 cases of solitary CHRPE provided additional information regarding this condition ( 2).

Bear tracks retina fap