Differential Diagnosis in Dermatopathology

Discussions

Pale-cell acanthoma and a plaque of psoriasis have numerous attributes histopathologic in common. Both are characterized by elongated epidermal rete ridges and correspondingly elongated dermal papillae. The long papillae house dilated, tortuous capi…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.37.1A: Pustular dermatitis, infundibular + 10.37.1B: Numerous Demodex folliculorum and squames in a zone of suppuration = Suppurative infundibulitis of unknown cause Demodex, Pityrosporum, bacteria, sebum, squames, and cornified…

Differential Diagnosis in Dermatopathology

Discussions

Nevus verrucosus and acanthosis nigricans are processes that affect the papillary dermis and the epidermis. Both conditions may display hyperkeratosis, epidermal hyperpigmentation, papillomatosis, melanophages, and an increased number of fibrocytes…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Chondrodermatitis Nodularis Helicis?

“At the dermatology meeting in Berlin, Jadassohn also indicated that changes in the cartilage can often be established clinically, especially the knobby sites on the helix that show a whitish transparence through a thinned epidermis. My expe…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous Horn?

“Cutaneous horns may complicate solar keratoses, viral warts, seborrheic warts, squamous cell carcinomas, lichenoid keratoses, and basal cell carcinomas.” McKee PH. Tumors of the surface epithelium. In: Pathology of the Skin with Clinic…

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

“Kyrle’s disease”

“Kyrle’s disease” Comment In our view, Kyrle’s disease is analogous in a way to Weber-Christian syndrome, Rothmann-Makai disease, Churg-Strauss allergic granulomatous, Wegener’s granulomatosis, Sulzberger-Gorbe disease,…