Search Results for: lichenoid

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.103.1A: Perivascular dermatitis, psoriasiform lichenoid + 10.103.1B: Infiltrate of histiocytes, plasma cells, lymphocytes, and neutrophils, edema of the papillary dermis, and neutrophils in the acanthotic epidermis, including in a broad zo…

Histologic Diagnosis of Inflammatory Skin Diseases

Algorithms Predicated on “Nonspecific” Findings

…lymphocytes and eosinophils in the dermis, usually in patchy lichenoid pattern = Prurigo pigmentosa + Edema of the papillary dermis and a sparse perivascular infiltrate of lymphocytes = Hand, foot, and mouth disease + Steel-gray nuclei and “ma…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen planus-like keratosis

…gic Superficial perivascular infiltrate of lymphocytes Patchy lichenoid infiltrate of lymphocytes Melanophages and necrotic keratocytes in the upper part of the dermis often Vacuolar alteration at the dermoepidermal junction and individual necrotic k…

Differential Diagnosis in Dermatopathology

Discussions

…histopathologically between the persistent pigmented purpuric lichenoid dermatitis of Gougerot and Blum and the plaque stage of mycosis fungoides may be exceedingly difficult at times because both diseases are made up of lymphocytes arrayed in band-l…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.61.1A: Perivascular dermatitis, spongiotic lichenoid + 10.61.1B: Lymphocytes mostly, in conjunction with scale-crusts that contain neutrophils = Lichen striatus  The presence of a lichenoid infiltrate telegraphs that this is not a pure spo…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…idermis, and then, it seems, coincidentally. Error: Keratosis lichenoides chronica is an eruption comparable to pityriasis lichenoides chronica. Reason: The features seen clinically in a classic example of keratosis lichenoides chronica are distincti…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen striatus

Lichen striatus Synonyms Linear lichenoid dermatosis Presentation stereotypical Age and sex Mostly girls, but sometimes boys and young adults of both sexes Distribution of lesions Usually an extremity Arrangement of lesions Linear Individual lesions…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…e. 10.63.3A: Perivascular dermatitis, interface, vacuolar and lichenoid, and marked edema in the upper part of the dermis + 10.63.3B: Mucin in the reticular dermis, edema in the papillary dermis, obscuration of the junction by lymphocytes, thin epide…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.59.1A: Perivascular dermatitis, interface, focally lichenoid + 10.59.1B: Beneath a thinned epidermis, obscuration partially of the dermoepidermal junction by an infiltrate of lymphocytes and histiocytes = Lichen nitidus, early A discrete f…