Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

“pilo- [L. pilus]. Combining form indicating hair. . . . tricho- [Gr. thrix, trichas, hair]. A prefix denoting a relationship to hair. . . . follicle- [L. folliculus, little bag]. A small secretory sac or cavity.” Tabers Cyclopedic Me…

Histologic Diagnosis of Inflammatory Skin Diseases

Telogen effluvium

Telogen effluvium Presentation stereotypical Age and sex Any age, but especially women following parturition Distribution of lesions Diffuse loss of hair on the scalp, especially from the parietal region; alopecia sometimes subtle and hardly evident…

Differential Diagnosis in Dermatopathology

Images

Alopecia areata Trichotillomania

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Alopecia areata Trichotillomania 1. Sparse infiltrate sometimes of lymphocytes around venules of the superficial and deep plexuses 1. Practically no infiltrate of inflammatory cells 2. In early lesions, infiltrate of lymphocytes in the vicinit…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Trichotillomania (developed fully) Traction Alopecia (end stage) 1. Number of follicles normal 1. Number of follicles seems to be decreased 2. More than half of the follicles in a section of tissue usually are in catagen 2. Far fewer than half…

Differential Diagnosis in Dermatopathology

Common baldness vs. Telogen effluvium

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…

Differential Diagnosis in Dermatopathology

Discussions

Common baldness and telogen effluvium are the best known and the most common examples of non-inflammatory alopecia of the two. Common baldness, as its title denotes, is the most common. Those two alopecias of different character and course share sev…

Differential Diagnosis in Dermatopathology

Images

Trichotillomania (developed fully) Traction Alopecia (end stage)…