Search Results for: hyperkeratosis

Differential Diagnosis in Dermatopathology

Nevus verrucosus vs. Acanthosis nigricans

A keratotic condition of the palms and soles, inherited usually, but sometimes acquired, in which involvement may be diffuse, circumscribed (including striate), or punctate.

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…extent 2. No flat-topped papillations across a broad front 2. Flat-topped papillations across a broad front often 3. Marked hyperkeratosis often 3. Slight, if any, hyperkeratosis 4. Laminate orthokeratosis predominates 4. Basket-woven…

Differential Diagnosis in Dermatopathology

Spitz’s nevus, compound type vs. Melanoma

A keratotic condition of the palms and soles, inherited usually, but sometimes acquired, in which involvement may be diffuse, circumscribed (including striate), or punctate.

Histologic Diagnosis of Inflammatory Skin Diseases

Lymphedema

…half of the dermis. Knobby and verrucous lesions are formed by striking papillomatosis, papillated epidermal acanthosis, and hyperkeratosis in addition to fibrosis. Differential diagnosis histopathologic Scarring of another cause usually is not…

Differential Diagnosis in Dermatopathology

Ichthyosis vulgaris vs. X-linked ichthyosis

A keratotic condition of the palms and soles, inherited usually, but sometimes acquired, in which involvement may be diffuse, circumscribed (including striate), or punctate.

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…air = Suppurative infundibulitis of bacterial cause Because this lesion is domed and infundibula display hypergranulosis and hyperkeratosis, it must have been rubbed persistently and forcefully, probably because of effects pruritogenic on nerves of…

Histologic Diagnosis of Inflammatory Skin Diseases

“Kyrle’s disease”

…e and of what he pictured in drawings, it never will be known what condition (or conditions) he actually described as “hyperkeratosis follicularis et parafollicularis in cutem penetrans,” a title that in itself is daunting and dizzying….

Histologic Diagnosis of Inflammatory Skin Diseases

Infundibulitis secondary to agents topical

…distinguishes some suppurative infundibulitides induced by agents topical from suppurative infundibulitides brought about by other types of factors noninfectious is the presence, concurrent, of comedones. A major provocateur of infundibular…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…anged as solitary units and in clusters in the epidermis common 10. No dull pink globules within the epidermis as a rule 11. Hyperkeratosis, hypergranulosis, and spinous-cell hyperplasia usual 11. Hyperkeratosis not prominent; no hypergranulosis…