Dermatology Practical & Conceptual

Pre-emptive diagnosis of a case of scabies by dermatopathology

Case presentation A 39-year-old woman reported to her general practitioner with a new pigmented skin lesion on her right pectoral region (Figure 1). Dermatoscopically there were no suspicious features and the decision was made to monitor it over a t…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

A malignant neoplasm made up of abnormal germinative cells analogous to those that compose the folliculosebaceous-apocrine germ in an embryo and that usually manifests clinically as a papule or nodule which may become ulcerated. On the basis of clin…

Differential Diagnosis in Dermatopathology

Discussions

Erythematous papules of acne vulgaris and of rosacea have in common localization mostly to the face, suppurative infundibulitis, and a mixed infiltrate of inflammatory cells in the dermis, it containing lymphocytes and plasma cells, and sometimes hi…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Discoid Lupus Erythematosus versus Systemic Lupus Erythematosus? II

“Lupus erythematosus is a disorder associated with innumerable clinical signs and symptoms and a wide range of laboratory abnormalities; it shows a spectrum of varying prognoses ranging from a benign, solely cutaneous variant (localized disco…

Histologic Diagnosis of Inflammatory Skin Diseases

Psoriasis

Psoriasis Presentation stereotypical Age and sex Persons of any age and of both sexes Distribution of lesions Localized, e.g., single papule or plaque, or universal, i.e., erythroderma; between these extremes, a preference for elbows and knees, scal…

Differential Diagnosis in Dermatopathology

Papular mucinosis vs Interstitial granuloma annulare

A malignant neoplasm made up of abnormal germinative cells analogous to those that compose the folliculosebaceous-apocrine germ in an embryo and that usually manifests clinically as a papule or nodule which may become ulcerated. On the basis of clin…

Differential Diagnosis in Dermatopathology

Discussions

The interstitial expression of granuloma annulare and of papular mucinosis have several findings histopathologic in common, among them mesenchymal cells with abundant pink cytoplasm scattered among bundles of collagen, multinucleate cells in section…

Dermatology Practical & Conceptual

Lecture Series

The free Adobe Flash Player is required to view these videos. Lecture Series: A series of lectures by A. Bernard Ackerman, MD on subjects from A Clinical Atlas of 101 Common Skin Diseases. Read Introduction A series of lectures by A. Bernard Acker…