Histologic Diagnosis of Inflammatory Skin Diseases

Seborrheic dermatitis

…is exacerbated by lithium. Differential diagnosis clinical Psoriasis on the face has no predilection for “seborrheic sites,” has sharply demarcated borders, and has more prominent scales. Allergic contact dermatitis, e.g., to fingernai…

Differential Diagnosis in Dermatopathology

Discussions

The small, drop-sized (guttate) papules of both guttate psoriasis and guttate (dermatosis) parapsoriasis have in common mounds of parakeratosis that may contain serum and are separated from one another by zones of orthokeratosis, slight spongiosis a…

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…

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…

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

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…

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…

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

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:…