RESUMEN
Structural features of 59 progressive nevuses of the conjunctiva were studied. The proliferation of the epithelium and melanocytes is partially compensated by spontaneous regression of the nevus structures. The growth of a nevus is structurally similar to tumor growth, but the nevuses lack the melanocyte dysplasia, the main sign of malignant degeneration. The immune reactions are involved in the tissue restructuring of the growing nevus. Permanent foci of photoelastosis reflect the significance of ultraviolet exposure as a factor of risk of the nevuses progress.
Asunto(s)
Neoplasias de la Conjuntiva/patología , Nevo Pigmentado/patología , Adolescente , Adulto , División Celular , Niño , Preescolar , Conjuntiva/ultraestructura , Progresión de la Enfermedad , Femenino , Humanos , Masculino , Melanocitos/ultraestructura , Persona de Mediana Edad , Estudios RetrospectivosRESUMEN
The authors analyze the pathohistological archives of the Tashkent Research Institute of Ophthalmic Diseases for the years 1985-1994 and their own materials collected in recent years: 44 eyes enucleated for retinoblastoma. The microscopic picture of 44 tumors is as follows: retinoblastoma A in 12 (27.3%) cases, retinoblastoma B in 16 (36.3%), retinoblastoma C in 9 (20.4%), and mixed form in 7 (16%) cases. The total level of retinoblastoma A and B is almost 64%; this condition is positively life-threatening. The authors emphasize the necessity of health education of the population and improvement of primary health care and prophylactic check-ups of preschool children.