Differential Diagnosis in Dermatopathology

Alopecia areata vs. Trichotillomania

…cells on follicles or to physiological or mechanical factors in which inflammatory cells play no role. Although the scalp is the site most often affected, any region of the skin that bears hair follicles may be involved by certain types of alopecia….

Histologic Diagnosis of Inflammatory Skin Diseases

Androgenetic (common) alopecia

Androgenetic (common) alopecia Presentation stereotypical Age and sex Adults, men mostly and more extensively than in women Distribution of lesions Symmetric on the scalp, particularly the frontoparietal region and the vertex of men and the midporti…

Histologic Diagnosis of Inflammatory Skin Diseases

Alopecia areata, totalis, universalis

…cells on follicles or to physiological or mechanical factors in which inflammatory cells play no role. Although the scalp is the site most often affected, any region of the skin that bears hair follicles may be involved by certain types of alopecia….

Histologic Diagnosis of Inflammatory Skin Diseases

Traction alopecia

…cells on follicles or to physiological or mechanical factors in which inflammatory cells play no role. Although the scalp is the site most often affected, any region of the skin that bears hair follicles may be involved by certain types of alopecia….

Histologic Diagnosis of Inflammatory Skin Diseases

Androgenetic (Common) alopecia

…cells on follicles or to physiological or mechanical factors in which inflammatory cells play no role. Although the scalp is the site most often affected, any region of the skin that bears hair follicles may be involved by certain types of alopecia….

A Clinical Atlas of 101 Common Skin Diseases

Lichen Planus

An inflammatory process consisting usually of violaceous papules that have a polygonal outline and flat top, and that tends to favor flexural surfaces of skin and the buccal mucosa of the oral cavity. It sometimes affects follicles and nail units as…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Follicular Degeneration Syndrome?

“An irreversible alopecia of the scalp occurs in negro women who straighten their hair with hot combs. The disease is common and distinctive, clinically and histopathologically. . . . Hot petrolatum used with the comb causes a chronic inflamm…