PURPOSE To compare emmetropization in albino and pigmented guinea pigs. METHODS Distributions of refractive state were examined in 214 albino and 234 pigmented guinea pigs. Albino (A) and pigmented (P) guinea pigs were divided into two groups, hyperopic (H) and myopic (M). Eye development was separately followed in 10 randomly selected animals from each group (AH, AM, PH, PM) from 2 to 10 wee...

Pigmented neurofibroma is a rare variant of neurofibroma showing melanin production. The clinical diagnosis is difficult to establish requiring the histopathological examination to differentiate between the melanotic neurofibroma and other pigmented tumours. We report an unusual case of a huge, recurrent, pigmented neurofibroma with extended, macroscopically striking pigmentation in a 45 year o...

background. the most common species isolated from primary endodontic infections are black-pigmented bacteria. these species are implicated in apical abscess formation due to their proteolytic activity and are fastidious in nature. therefore, the present study was carried out to evaluate the presence and identification of various pigmented porphyromonas and prevotella species in the infected roo...

Mature female leopard frogs, Rana pipiens, collected from several sites in Minnesota from 1967 through 1977, were examined for the presence of pigmented oocytes. An increase in the percent of mature females with pigmented oocytes was observed in the frogs captured in 1977 compared to those captured earlier. Coincident with the increase in prevalence of females with pigmented oocytes, there was ...

BACKGROUND The pigmented or melanotic variant of choroid plexus carcinoma is very rarely encountered. CASE REPORT We report herein a case of melanotic or pigmented choroid plexus carcinoma in the posterior fossa of an 11-year-old female. CONCLUSIONS A histopathological study supported by immunohistochemistry helped the authors to diagnose this rare entity. How to differentiate this tumor fr...

Several pigment-specific lasers can effectively treat epidermal and dermal pigmented lesions without complications using the basic principles of selective photothermolysis. Although such pigmented lesions as solar lentigines and nevi of Ota are relatively easy to treat using pigment-specific laser technology, café-au-lait macules and melasma show variable responses to treatment. New, long-pulse...

Background and aim: Pigmented purpuric dermatoses are a group of chronic and recurrent skin diseases resulting from lymphocyte-mediated leakage of erythrocytes. No effective treatment has been suggested for these conditions. This study was performed to evaluate the efficacy of oral pentoxiphylline in the treatment of pigmented purpuric dermatoses.Materials and Methods: ...