TY - JOUR
T1 - Retinoblastoma in a dog
AU - Syed, Nasreen A.
AU - Michael Nork, T.
AU - Poulsen, Gretchen L.
AU - Riis, Ronald C.
AU - George, Catherine
AU - Albert, Daniel M.
PY - 1997
Y1 - 1997
N2 - Objectives: To describe and classify a retinal tumor found in a dog that histologically resembles human retinoblastoma and to discuss the molecular mechanisms of retinal oncogenesis. Methods: A dog eye with a retinal tumor was examined histologically. Studies including immunocytochemical analysis for retinal S-antigen and glial fibrillary acidic protein, enzyme histochemical analysis for carbonic anhydrase, and nick-end DNA labeling were used to characterize the tumor. Normal retina from another dog and other tumors from dogs, including 2 ciliary body medulloepitheliomas and a brain medulloepithelioma, were examined as controls. Results: The retinal tumor disclosed characteristics typical of human retinoblastoma, including Flexner- Wintersteiner rosettes. It showed strong immunoreactivity with S-antigen and glial fibrillary acidic protein. Carbonic anhydrase activity also could be shown in the tumor. Apoptosis was found to be the predominant method of cell death as shown by nick-end DNA labeling. In contrast to the other tumors examined, this tumor contained areas with retinal photoreceptor and glial differentiation. Conclusions: The histopathologic findings and differential staining characteristics in this retinal tumor are compatible with retinoblastoma, making this, to our knowledge, the first documented case of spontaneous retinoblastoma in an animal.
AB - Objectives: To describe and classify a retinal tumor found in a dog that histologically resembles human retinoblastoma and to discuss the molecular mechanisms of retinal oncogenesis. Methods: A dog eye with a retinal tumor was examined histologically. Studies including immunocytochemical analysis for retinal S-antigen and glial fibrillary acidic protein, enzyme histochemical analysis for carbonic anhydrase, and nick-end DNA labeling were used to characterize the tumor. Normal retina from another dog and other tumors from dogs, including 2 ciliary body medulloepitheliomas and a brain medulloepithelioma, were examined as controls. Results: The retinal tumor disclosed characteristics typical of human retinoblastoma, including Flexner- Wintersteiner rosettes. It showed strong immunoreactivity with S-antigen and glial fibrillary acidic protein. Carbonic anhydrase activity also could be shown in the tumor. Apoptosis was found to be the predominant method of cell death as shown by nick-end DNA labeling. In contrast to the other tumors examined, this tumor contained areas with retinal photoreceptor and glial differentiation. Conclusions: The histopathologic findings and differential staining characteristics in this retinal tumor are compatible with retinoblastoma, making this, to our knowledge, the first documented case of spontaneous retinoblastoma in an animal.
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U2 - 10.1001/archopht.1997.01100150760012
DO - 10.1001/archopht.1997.01100150760012
M3 - Article
C2 - 9194728
AN - SCOPUS:0030921414
SN - 0003-9950
VL - 115
SP - 758
EP - 763
JO - Archives of ophthalmology
JF - Archives of ophthalmology
IS - 6
ER -