Search Results for: melanocytes

When all you have is a dermatoscope—start looking at the nails

When all you have is a dermatoscope—start looking at the nails

…continuous, longitudinal pigmented streaks (longitudinal melanonychia) may either be caused by a benign activation of matrix melanocytes (e.g., as a result of trauma, inflammation, or adverse drug reactions) or by a true melanocytic proliferation…

Complete regression of a melanocytic nevus after epilation with diode laser therapy

Complete regression of a melanocytic nevus after epilation with diode laser therapy

…he preferential targeting of melanin in the hair follicle over melanin in the epidermis. In a nevus, the increased number of melanocytes and melanin suggests that the photons of the laser for hair removal might be absorbed by the neoplastic…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Borderline, Minimal Deviation, and Nevoid Melanomas?

…potential for metastasis.” “Six forms of minimal deviation melanoma have been described . . . A small nodule of melanocytes that show moderate to moderately severe atypism and impinge on the reticular dermis . . . Minimal deviation…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Atrophie Blanche?

…f months, as a result of sclerosis, loss of melanin from epidermal keratocytes into dermal melanophages and impotence of the melanocytes remaining at those sites, lesions become white macules and atrophic patches. The term atrophie blanche…

Histologic Diagnosis of Inflammatory Skin Diseases

Tinea nigra

…olor. Potassium hydroxide preparation is negative for fungi in the cornified layer of benign and malignant proliferations of melanocytes. Stain of skin by silver nitrate has an unnatural appearance because it is caused artifactually. It can be…

Histologic Diagnosis of Inflammatory Skin Diseases

Merkel Cells

…f any seeming association with neural elements. Merkel cells appear in fetal skin by the 16th week of gestation, and, unlike melanocytes, they do not come from the neural crest, and, unlike Langerhans” cells, they do not come from the bone…

Histologic Diagnosis of Inflammatory Skin Diseases

Introduction

…idual components of the skin, namely, epidermis, hair follicles, sebaceous units, apocrine units, eccrine units, nail units, melanocytes, Langerhans” cells, Merkel cells, structures of the dermoepithelial interface, blood vessels, lymphatics,…