Study By Disease

Study By Disease

“Blue nevus” (Jadassohn-Tièche) (Quiz #360) “Blue nevus” (Jadassohn-Tièche) (Quiz #525) “Blue nevus” (Masson’s blue neuronevus) (Quiz #359) “Collagenous” nevus, papillary dermal type* (Quiz #11…

Differential Diagnosis in Dermatopathology

Discussions

Grover’s disease manifests itself as several variants histopathologic, one of which mimics pemphigus vulgaris. Both pemphigus vulgaris and Grover’s disease are characterized by suprabasal separation above which acantholytic cells are arr…

Differential Diagnosis in Dermatopathology

Discussions

Verrucous seborrheic keratosis and verrucous epidermal nevus share several findings histopathologic, among them laminate and basket-woven orthokeratosis, an epidermis thinned in some foci and thickened in others, the presence sometimes of “hor…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Churg-Strauss Granuloma and Allergic Granulomatosis?

“The occurrence of a clinical syndrome of severe asthma, fever, and hypereosinophilia, together with symptoms of vascular embarrassment in various organ systems, has been established. . . . The basic anatomical changes . . . consisted of wide…

Differential Diagnosis in Dermatopathology

Discussions

Nevus verrucosus and acanthosis nigricans are processes that affect the papillary dermis and the epidermis. Both conditions may display hyperkeratosis, epidermal hyperpigmentation, papillomatosis, melanophages, and an increased number of fibrocytes…

Differential Diagnosis in Dermatopathology

Discussions

Porokeratotic epidermal nevus and inflammatory linear verrucous epidermal nevus have in common well-circumscribed loci of parakeratosis beneath which the granular zone is absent, alternation of zones of ortho- and parakeratosis, and an epidermis tha…

Differential Diagnosis in Dermatopathology

Discussions

Pale-cell acanthoma and a plaque of psoriasis have numerous attributes histopathologic in common. Both are characterized by elongated epidermal rete ridges and correspondingly elongated dermal papillae. The long papillae house dilated, tortuous capi…