Search Results for: psoriasis

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

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…

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…

Histologic Diagnosis of Inflammatory Skin Diseases

Seborrheic dermatitis

…is 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…

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 along the de…

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 exc…

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…