Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

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…

Differential Diagnosis in Dermatopathology

Instructions for Authors

…n stands should precede its first use unless it is a standard unit of measure. Refer to drugs and therapeutic agents by their accepted generic or chemical names, and do not abbreviate the name. Use code numbers only when a generic name is not yet ava…

Histologic Diagnosis of Inflammatory Skin Diseases

Psoriasis

…s other than psoriasiform ones, e.g., vesicular or infundibulofollicular (Majocchi’s granuloma), vegetating plaque, nodules, and tumors (kerion). Seborrheic dermatitis is characterized by serum in conjunction with mounds of parakeratosis that f…

Differential Diagnosis in Dermatopathology

Papular mucinosis vs Interstitial granuloma annulare

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…

Dermatology Practical & Conceptual

Diagnosis of ophthalmomyiasis externa by dermatoscopy

…, Rhinoestrus purpureus, which are found in sheep farming communities. Often the victims have the sensation of being struck by a foreign body or insect. Soon thereafter a painful inflammation develops, causing an acute catarrhal conjunctivitis [1,2]….

Dermatology Practical & Conceptual

Lecture Series

…s Clues to Misdiagnosis Part 1 | Part 2 | Part 3 The Nail Unit: From Basic Structure to Melanotic Streaks Part 1 | Part 2 Small-plaque parapsoriasis, like large-plaque parapsoriasis, is mycosis fungoides Part 1 | Part 2 Dysplastic Nevus: Mess…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen striatus

…gmented papules in dark-skinned persons Involvement of a nail unit with eventual dystrophy of the nail plate Differential diagnosis clinical Linear lichen planus is purple, and individual papules are topped by white streaks arranged in a reticulate…