Differential Diagnosis in Dermatopathology

Discussions

…r lichen planus, and lichen striatus. An epidermal nevus is a hamartoma that, on biopsy, is found to have different characteristics histopathologic that are reflected in differences clinical. Among the findings histopathologic in epidermal nevi are v…

Differential Diagnosis in Dermatopathology

Discussions

…gen cyst is the setting in which a proliferating tricholemmal cystic carcinoma develops rarely. That carcinoma in times past was thought to be wholly benign and therefore was given names such as subepidermal acanthoma, proliferating isthmus-catagen c…

Histologic Diagnosis of Inflammatory Skin Diseases

Parasitic infestations

…ack, but recurring for many years, and papules and nodules of cysticercosis remaining for a lifetime unless they are removed surgically. Variations clinical Amebiasis in the skin may result from extension direct of the organism, Entamoeba histolytic…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Distinctive but Nonspecific Findings Using High Magnification

…and present in a space are met with in various inflammatory, cystic,and neoplastic processes characterized by acantholytic dyskeratosis, e.g., Grover’s disease, warty dyskeratoma, and pseudoglandular squamous-cell carcinoma, including the superficia…

Differential Diagnosis in Dermatopathology

Infundibular cyst vs. Isthmus-catagen cyst

Epidermal nevi are hamartomas in which the epidermis is abnormal, being hyperkeratotic, and in which lesions are aligned along Blaschko’s lines….

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Apocrine mixed tumor Eccrine mixed tumor 1. Asymmetrical 1. Symmetrical 2. Epithelial component not distributed in uniform fashion 2. Epithelial component distributed in relatively uniform manner 3. Some solid zones of neoplastic epithelium…

Differential Diagnosis in Dermatopathology

Lecture Series

…ll Carcinoma in situ is Not Analogous to Melanoma in situ and Apocrine Carcinoma in situ Part 1 | Part 2 Deep Penetrating Nevus Part 1 | Part 2 | Part 3 | Part 4 Resolution at Last of the Controversy Concerning the Concept of Dysplastic Nevu…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermatofibroma

…nd act like follicular papillae to induce from that epidermis folliculosebaceous units. The phenomenon represents a recapitulation of events in embryonic life during which nubbins of primitive mesenchymal cells call forth primordial infundibulo-apocr…

Differential Diagnosis in Dermatopathology

Images

Apocrine mixed tumor Eccrine mixed tumor…