Differential Diagnosis in Dermatopathology

Apocrine mixed tumor vs. Eccrine mixed tumor

…les may be centered in follicles (Majocchi’s granuloma). Lesions may occur on any anatomic site, but particularly on the scalp (tinea capitis), inguinal region (tinea cruris), hands (tinea manum), feet (tinea pedis), and nails (onychomycosis)….

Dermatology Practical & Conceptual

Blue nevus with a starburst pattern on dermoscopy

…e also observed in some cases of blue nevus [4]. On the other hand, Spitz nevi usually present as solitary lesions on the lower extremities or the face. Clinically, a Spitz nevus is a rapidly growing pink-red or reddish-brown dome-shaped papule or no…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…ces be appreciated between the names of those lesions, on one hand, and the actual character of them, on the other. A first step in that understanding is acknowledging that pilo- and tricho- mean hair, and folliculo- means follicle. The so-called hai…

Dermatology Practical & Conceptual

Melanoma arising in a giant nevus spilus maculosus

…error cannot be excluded. Papular nevus spilus, on the other hand, is characterized by dark brown papules or nodules on a light-brown background, although small dark spots may also be present [3]. Histopathologically, this type of nevus spilus shows…

Dermatology Practical & Conceptual

Spitz and Reed nevi: acquired or congenital?

…s been reported to grow even at the palate [55]. On the other hand, the possible congenital onset of Reed nevi argues against their UV-dependent acquired histogenesis. Interestingly, largish junctional melanocytic nests are an expected finding not on…

Differential Diagnosis in Dermatopathology

Discussions

…al skin markings. It is found always within easy reach of the hands, which are skilled at rubbing and at using an adjunctive object (such as a hairbrush or a towel) to do the job. Prurigo nodularis is merely a papule or nodule produced by the effects…

Differential Diagnosis in Dermatopathology

Lichen simplex chronicus vs. Hypertrophic lichen planus

…les may be centered in follicles (Majocchi’s granuloma). Lesions may occur on any anatomic site, but particularly on the scalp (tinea capitis), inguinal region (tinea cruris), hands (tinea manum), feet (tinea pedis), and nails (onychomycosis)….