A Clinical Atlas of 101 Common Skin Diseases

Melanocytic Nevi and Melanotic Macules

Hamartomas (“congenital” melanocytic nevi) and benign neoplasms (“acquired” melanocytic nevi) of various specific types, all of which are composed of abnormal melanocytes and manifested clinically as lesions of different colo…

A Clinical Atlas of 101 Common Skin Diseases

Herpes Simplex, Zoster, and Varicella

Conditions caused by infection with different strains of herpesvirus and typified when fully developed by tense vesicles, herpes simplex consisting of grouped vesicles on an erythematous base, zoster being made up of vesicles, sometimes hemorrhagic…

Dermatology Practical & Conceptual

Pigmented tumor in the nostril

Abstract A 64-year-old man was noted to have a single pigmented lesion in the nostril of his nose. Clinical examination revealed a 5 mm nodular growth and brown lesion. With a presumed clinical diagnosis of malignant skin tumor, a biopsy was perform…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Lentigo?

“Because lentigines are larger and more variegated than true freckles, they are not uncommonly biopsied to exclude melanocytic dysplasia or radial growth phase melanoma, such as lentigo maligna.” Murphy G. Melanocytic tumors. In: Derma…

Histologic Diagnosis of Inflammatory Skin Diseases

Sebaceous Units

…elial cells proliferate once again and, one by one, accumulate lipid. In the course of weeks, fully lipidized sebaceous lobules, as well as ducts, come to replace undifferentiated cells of the mantle. After scores of years, at menopause and andropaus…

Differential Diagnosis in Dermatopathology

Discussions

Dilated pore and pilar sheath acanthoma have numerous denominators in common. Both are characterized by a central crater comprised of contiguous infundibula and within the crater are plugs of cornified cells. Both conditions exhibit buds of epitheli…

Histologic Diagnosis of Inflammatory Skin Diseases

Hair Follicles

Morphologic and qualitative differences in hair, a cornified end-product of matrical cells positioned in the center of a follicular bulb, exist among the races of Man. In general, Caucasians have the most prominent hair, Asians have the least, and A…