Search Results for: infundibulo-sebaceous-apocrine unit

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Apocrine (clear-cell) hidradenoma Eccrine (poroid) hidradenoma 1. Connects to infundibula often 1. No connection to infundibula; merges with surface epidermis rarely 2. Glandular structures usually 2. Ductal structures usually 3….

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen striatus

…pidermis and, sometimes, between the dermis and epithelial structures of adnexa Necrotic keratinocytes scattered as solitary units within the epidermis Slight spongiosis Focal parakeratosis Fully developed Superficial and deep perivascular…

Histologic Diagnosis of Inflammatory Skin Diseases

Psoriasis

…was thought to be psoriasis histopathologically turns out to be dermatophytosis. Nowhere is that more true than in the nail unit. Whether pustules are seen clinically depends on the size of the collections of neutrophils in surface epidermis. If…

Two adjacent individual fibroepithelioma of Pinkus of the umbilicus—one pink, one pigmented—a case report and review of the literature

Two adjacent individual fibroepithelioma of Pinkus of the umbilicus—one pink, one pigmented—a case report and review of the literature

Abstract We present a unique case of separate and independent adjacent fibroepitheliomas of Pinkus (FeP) arising from the umbilicus in an 83-year-old man. Of further interest, one is pigmented and the other nonpigmented. Clinical, dermatoscopic and…

Appearances may be deceiving

Appearances may be deceiving

The patient A 64-year-old white female presented with an asymptomatic brown-to-black nodular lesion located on her back in proximity (about 1.7 cm) to a surgical scar; indeed, the patient had developed a melanoma in situ on her back in 2010. She…

Differential Diagnosis in Dermatopathology

Discussions

…annulare, in contrast with the palisaded pattern of that condition, deposits of mucin are less abundant and histiocytes per unit area of dermis are fewer. Not uncommonly, both patterns are encountered together in the same section of tissue. Those…

Prediction without Pigment: a decision algorithm for non-pigmented skin malignancy

Prediction without Pigment: a decision algorithm for non-pigmented skin malignancy

…red to as a starburst vessel pattern in the reference cited [16] (Figure 2F – SCC) and BCC with ulceration, as well as sebaceous gland hyperplasia (additional clue: several white or yellow clods in central location) and molluscum contagiosum…

Extensive regression in pigmented skin lesions: a dangerous confounding feature

Extensive regression in pigmented skin lesions: a dangerous confounding feature

Abstract Spontaneous regression in melanomas is not an uncommon phenomenon, as it has been described in 10-35% of primary cutaneous lesions [1]. Regression does not appear to predict a more favorable course, since even fully regressed melanomas may…

Dermoscopy of alopecia areata—a retrospective analysis

Dermoscopy of alopecia areata—a retrospective analysis

…m each follicle—a sign of hair regrowth. Figure 8. White peripilar sign seen in patients on treatment with two to three hair unit emerging from each follicle a sign of hair regrowth. [Copyright: ©2017 Jha et al.] Discussion A study done by Inui et…

About transitions

About transitions

Dear Readers, Mark A. Hurt, the Editor of the Book Review Section of Dermatology Practical & Conceptual has decided, after a decade of contributions, that the time has come to him to transition out of his role. Mark was recruited by Bernie…