Histologic Diagnosis of Inflammatory Skin Diseases

Pellagra

…syrup disease are identical to pellagra histopathologically. Psoriasis sometimes is marked by pallor in the upper part of the viable epidermis, but it is accompanied then by psoriasiform acanthosis, some rete ridges of which are thin, as are suprapa…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…ituation is analogous to a slowly developing papule/plaque of psoriasis in contrast to rapidly developing guttate or even pustular lesions. 10.66.5A: Perivascular dermatitis, interface, vacuolar + 10.66.5B: Lymphocytes around venules and al…

Dermatology Practical & Conceptual

Microscopic examination of normal nail clippings

…m that, nail-clipping microscopy was superficially studied in psoriasis [2], but in comparison to fungal infection; alopecia areata [9], a light and electron microscopic study in only nine patients; and in onychomatricoma [10], a case report. As far…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Parapsoriasis?

“Parapsoriasis. Under this provisional name, Brocq in 1902 grouped several rare and unclassifiable dermatological types, characterized by nonpruriginous erythmato-squamous spots, extremely persistent and rebellious to all treatment. It is ex…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…the epidermis and papillary dermis resembles closely that of psoriasis, but the combination of lichenoid infiltration and numerous lymphocytes in the epidermis militates against psoriasis and indicates mycosis fungoides. 11.14.3A: Nodular derm…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Psychocutaneous Disorders?

…seems to be true that certain inflammatory diseases, such as psoriasis, seborrheic dermatitis, and rosacea, are worsened by the effects of lability emotional. What has been written thus far is not meant to imply that emotions alone are responsible f…

Histologic Diagnosis of Inflammatory Skin Diseases

The Algorithmic Method

…thin rete ridges and thin dermal papillae of even length for psoriasis (see Fig. 5.108). Next in the series of discernments is scrutiny, confirmed at higher magnification, of the kind or kinds of inflammatory cells (or neoplastic lymphocytes, Langer…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Necrotizing Vasculitis?

…r the same disease. There are nearly 10 synonyms for pustular psoriasis and at least 60 for leukocytoclastic vasculitis. The recondite term subcorneal pustular dermatosis of Sneddon and Wilkinson does not communicate that that disease really is pustu…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Figurate Erythemas?

…the plaque stage of mycosis fungoides, from a presentation of psoriasis to one of pemphigus vulgaris, i.e., the urticarial. Under the title “Figurate erythemas” in the textbook by Fitzpatrick and associates, the authors wrote as follows:…