Diseases Resulting From Fungi and Yeasts

Aug 29, 2019 by in Dermatology Comments Off on Diseases Resulting From Fungi and Yeasts

Superficial and Deep Mycoses Fungal infections, including dermatophytes and candida, are the most common type of infection worldwide. Cutaneous infections are divided into superficial (those that affect mostly the skin)…

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Cutaneous Lymphoid Hyperplasia, Cutaneous T-Cell Lymphoma, Other Malignant Lymphomas, and Allied Diseases

Aug 29, 2019 by in Dermatology Comments Off on Cutaneous Lymphoid Hyperplasia, Cutaneous T-Cell Lymphoma, Other Malignant Lymphomas, and Allied Diseases

Cutaneous Lymphoid Hyperplasia (Lymphocytoma Cutis, Lymphadenosis Benigna Cutis, Pseudolymphoma) Benign cutaneous lymphoid hyperplasia can be caused by medications, injected foreign substances, infections, and arthropod bites, or it may be idiopathic….

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Melanocytic Nevi and Neoplasms

Aug 29, 2019 by in Dermatology Comments Off on Melanocytic Nevi and Neoplasms

Melanocytes originate in the embryonal neural crest and migrate to the epidermis, dermis, leptomeninges, retina, mucous membrane epithelium, inner ear, cochlea, and vestibular system. Nevus cells are a form of…

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Macrophage/Monocyte Disorders

Aug 29, 2019 by in Dermatology Comments Off on Macrophage/Monocyte Disorders

Granulatomatous reactions generally represent patterns of chronic inflammation that may take a long time to develop and a long time to respond to treatment. Granulomatous inflammation can occur in the…

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Connective Tissue Diseases

Aug 29, 2019 by in Dermatology Comments Off on Connective Tissue Diseases

Lupus erythematosus (LE), dermatomyositis (DM), scleroderma, rheumatoid arthritis, Sj√∂gren syndrome, eosinophilic fasciitis, relapsing polychondritis, and related disorders are classified as connective tissue diseases. Basic to all these is a complex…

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Syphilis, Yaws, Bejel, and Pinta

Aug 29, 2019 by in Dermatology Comments Off on Syphilis, Yaws, Bejel, and Pinta

Syphilis Syphilis, also known as lues, is a contagious, sexually transmitted disease caused by the spirochete Treponema pallidum subspecies pallidum. The only known host is the human. The spirochete enters…

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Mycobacterial Diseases

Aug 29, 2019 by in Dermatology Comments Off on Mycobacterial Diseases

Tuberculosis No ideal classification scheme exists for cutaneous tuberculosis (TB), but the system listed here is logical and takes into account the mechanism of disease acquisition. Unfortunately, unlike in Hansen…

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Acne

Aug 29, 2019 by in Dermatology Comments Off on Acne

Acne Vulgaris Clinical Features Acne vulgaris is a chronic inflammatory disease of the pilosebaceous follicles, characterized by comedones, papules, pustules, nodules, and often scars. The comedo is the primary lesion…

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Lichen Planus and Related Conditions

Aug 29, 2019 by in Dermatology Comments Off on Lichen Planus and Related Conditions

Lichen Planus Lichen planus (LP) is a common, pruritic, inflammatory disease of the skin, mucous membranes, and hair follicles. It occurs throughout the world, in all races. Cutaneous LP affects…

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Contact Dermatitis and Drug Eruptions

Aug 29, 2019 by in Dermatology Comments Off on Contact Dermatitis and Drug Eruptions

Contact Dermatitis There are two types of dermatitis caused by substances coming in contact with the skin: irritant dermatitis and allergic contact dermatitis. Irritant dermatitis is an inflammatory reaction in…

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