Differential Diagnosis in Dermatopathology

Alopecia areata vs. Trichotillomania

Loss of hair attributable either to the effects of inflammatory 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 be…

Histologic Diagnosis of Inflammatory Skin Diseases

Androgenetic (common) alopecia

…portion of the scalp of women Variations clinical Male pattern alopecia: Gradual loss of hair in the vertex and frontoparietal regions particularly; anterior hairline recedes progressively and bilaterally. Female pattern alopecia: Diffuse hair loss t…

Histologic Diagnosis of Inflammatory Skin Diseases

Alopecia areata, totalis, universalis

Loss of hair attributable either to the effects of inflammatory 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 be…

Histologic Diagnosis of Inflammatory Skin Diseases

Traction alopecia

Loss of hair attributable either to the effects of inflammatory 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 be…

Histologic Diagnosis of Inflammatory Skin Diseases

Androgenetic (Common) alopecia

Loss of hair attributable either to the effects of inflammatory 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 be…

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?

…“clinically and histologically distinct form of scarring alopecia” that was “formerly called hot comb alopecia,” a name that had been given in 1968 by LoPresti, Papa, and Kligman to an irreversible, partial, scarring alopecia