Differential Diagnosis in Dermatopathology

Discussions

…ve tissue at the base of follicles is affected mostly, whereas trichotillomania is a factitious condition that results from persistent twisting, back and forth, of hairs. Plucking and pulling of hairs also are common practices in patients with tricho…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Psychocutaneous Disorders?

“The influence of the psyche on the skin is greater than on any other organ. It is apparent in the many cutaneous expressions of the emotions, subjective, as well as objective, both in man and in animals. It is for this reason that the skin i…

Histologic Diagnosis of Inflammatory Skin Diseases

Traction alopecia

…ornrows. Comment Traction alopecia should not be confused with trichotillomania, the two conditions being wholly different from one another in nearly all respects. Trichotillomania results from twisting hair shafts back and forth until, eventually, t…

Differential Diagnosis in Dermatopathology

Discussions

…c among the alopecias. The criteria for distinguishing between trichotillomania and traction alopecia listed at the outset of this chapter are examples of how a particular problem in differential diagnosis of alopecias can be resolved. Trichotilloman…

Histologic Diagnosis of Inflammatory Skin Diseases

Alopecia areata, totalis, universalis

…lopecia areata, the exception being alopecia in a patient with trichotillomania, the hairs in that patient having been plucked as well as twisted. As a rule, patients with trichotillomania simply twist hairs rather than pluck them, too. An infiltrate…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.3.1A: Perifolliculitis (peribulbitis), lymphocytic + 10.3.1B: Infiltrates around the lower part of a follicle, i.e., the bulb, and each follicle being in the same stage of devolution = Alopecia areata In addition to lymphocytes…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…to wit, trichomalacia, the most common sign histopathologic of trichotillomania. Traction alopecia is an inflammatory disease; it exhibits lichenoid peri-infundibulitis and perifolliculitis “early” in its course; trichotillomania, by cont…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Anagen Effluvium?

“The follicle tends to respond in an all or none fashion with the notable exception of its response to cancer chemotherapy agents. This is the only known instance in which hair is lost follicles which continue in their growing phase without b…