Search Results for: dermis

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Blue Nevus?

…east some markedly pigmented, bipolar, dendritic melanocytes and by the absence of discrete nests of melanocytes from the epidermis and the dermis. Our cumbersome definition of blue nevus fails, like all others, have failed and are doomed to fail,…

Histologic Diagnosis of Inflammatory Skin Diseases

Blood Vessels

…uated in the lower part of the reticular dermis, and the superficial plexus is positioned in the upper part of the reticular dermis, just beneath the papillary dermis. In times past, the superficial plexus was called the “subpapillary…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Radial Growth Phase versus Vertical Growth Phase of Melanoma?

…but not filling it). Vertical growth phase substituted for the old levels III (neoplastic melanocytes filling the papillary dermis and causing the reticular dermis to become bowed), IV (neoplastic melanocytes within the reticular dermis), and V…

Histologic Diagnosis of Inflammatory Skin Diseases

Polymorphous light eruption

…infiltrate of lymphocytes Marked edema of the papillary dermis Subepidermal vesiculation secondary to edema of the papillary dermis occurs uncommonly; epidermis usually tethered to the dermis by gossamer strands of collagen Spongiosis of variable…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…ratching Sharp fingernails applied with fury to the skin produce the findings shown here, namely, clefts between necrotic epidermis and dermis. The alterations, those of “neurotic excoriation,” are dominant in many lesions of atopic…

Histologic Diagnosis of Inflammatory Skin Diseases

Arthropod assaults

…ropod assault may seem to be wholly subepidermal as a consequence of severe edema of the papillary dermis that raises the epidermis from the dermis. That phenomenon usually occurs in the urticarial rim that surrounds a central vesicle of an insect…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…egetans is a variant morphologic of pemphigus vulgaris, namely, vegetating lesions clinical and countless eosinophils in the dermis and in surface and infundibular epidermis histopathologic, the latter often assuming pseudocarcinomatous proportions,…