Biomedical subjects

J V Thomas

Publications and source records attributed to J V Thomas.

49 records · Page 3Linked to original sources

PubMed1979

Small choroidal melanomas. A long-term follow-up study.

Complete follow-up information was obtained on 65 patients whose eyes had been enucleated for small choroidal melanomas three months to 34 years previously. All tumors were 300 cu mm (10 x 10 x 3 mm) or less in volume. The average and median lengths of follow-up were nine years and 7.2 years, respectively. The 5-, 10-, and 15-year tumor-related death rates were found to be lower than those previously reported for small melanomas after enucleation, and the same as the estimated tumor-related mortality in patients who had not undergone enucleation. The average volume of tumors that caused metastatic death was more than twice that of tumors that did not. There were no metastatic deaths in 42 patients with tumors less than 98 cu mm (7 x 7 x 2 mm) in volume. Waiting to observe growth in tumors less than 98 cu mm in size did not appear to increase the risk of death from metastatic melanoma.

Choroid Neoplasms↗

PubMed1979

Foveal hypoplasia and bilateral 360-degree peripheral retinal rosettes.

A 24-year-old woman had bilateral pendular nystagmus, foveal hypoplasia, 360-degree peripheral retinal rosettes, and hypoplastic ora serrata of nongenetic origin. Kinetic perimetry revealed a generalized constriction of the field. Flicker perimetry revealed general depression of the critical flicker frequencies in the entire field. A slight increase of the threshold for light sensitivity after dark adaptation was noted from 10 to 30 degrees. Haidinger brush phenomenon was abnormal. Color vision was normal. The electroretinogram revealed mild abnormalities in the photopic flicker response. The visual-evoked response, recorded by local macular stimulation, was abnormal. The relationship of foveal hypoplasia to peripheral retinal rosettes in this case may have been caused by an intercurrent infection during the late stages of embryogenesis.

Adult↗

PubMed1978

Glaucoma-inducing mechanisms in eyes with retinoblastoma.

A total of 149 eyes with retinoblastomas were examined histopathologically to determine the types and frequencies of mechanisms inducing glaucoma. The most common mechanism was iris neovascularization with secondary peripheral anterior synechiae formation. In such cases, the tumor was almost always located at the posterior pole with involvement of central retinal vessels and with growth of a highly vascularized tumor mass into the vitreous. The second most common mechanism was massive exudative retinal detachment causing pupillary block and angle closure. In such cases, tumor growth was present within and under the retina. The third most common mechanism was a combination of the aforementioned mechanisms. Uveitis and/or necrotic tumor tissue in the anterior chamber as the sole mechanism inducing glaucoma was infrequently seen.

Cornea↗

PubMed1978

Correlation of epinephrine use and macular edema in aphakic glaucomatous eyes.

One hundred twenty-eight consecutive aphakic glaucomatous eyes of 91 patients were examined by fluorescein angiography. Macular edema was present in 16 (28%) of 56 eyes currently being treated with epinephrine and 9 (13%) of 72 eyes not currently being treated with epinephrine. This difference is statistically significant at the 95% confidence level. Epinephrine therapy was discontinued in seven eyes with macular edema. A follow-up of these patients for six months to one year with serial anglograms showed resolution of edema in six of seven eyes. In one eye without macular edema, administration of epinephrine was associated with appearance of edema. Discontinuing epinephrine therapy was associated with resolution of edema. No significant correlation was found between use of other antiglaucomatous medications and macular edema. It is evident from this study that there is statistical support for the concept of an epinephrine-induced macular edema.

Adult↗

PubMed1978

Von Hippel's disease in association with von Recklinghausen's neurofibromatosis.

Ten members of a large family who showed manifestations of either von Hippel-Lindau disease or von Recklinghausen's neurofibromatosis were examined. Three of 10 members were found to have retinal angiomas which had not been present on fundus examination 3 years previously. These angiomas were associated with ocular and systemic signs of neurofibromatosis. These cases show overlapping manifestations of different phakomatoses and provide support for the concept of a common aetiology for these diseases.

Adolescent↗

PubMed1977

Ocular manifestations of focal dermal hypoplasia syndrome.

Although 40 percent of patients with the focal dermal hypoplasia syndrome have ocular abnormalities, to our knowledge, only one case of this condition has been previously described in the ophthalmic literature. Two additional cases are presented, and the systemic and ocular findings are reviewed.

Adolescent↗

PubMed1973