Traumatic Anserine Folliculosis (TAF) is an infrequently reported, localized skin condition resulting from constant or repeated friction or pressure on a specific area of the skin. Prolonged skin friction, such as when resting the head on the hands (a common posture while studying or using electronic devices), may account for the prevalence of TAF, primarily in the chin, neck, and cheek regions. Most documented cases have been in children and adolescents, with an association between the condition and a history of atopy. ICD-10 Code L73.8
This condition predominantly occurs in children and adolescents due to their delicate skin, which is more susceptible to friction and trauma. Patients typically report a history of adopting certain positions that result in repeated friction and pressure on the affected area. Many cases of traumatic anserine folliculosis are associated with a background of atopy.
It is characterized by the appearance of multiple skin-colored discrete but grouped follicular papules with a sandpaper-like feel to palpation and no surrounding erythema. The chin, jaws, and neck are the most commonly affected areas. The oral mucosa, hair, and nails were uninvolved. General and systemic examination was within normal limits.
The diagnosis is based on the clinical presentation, medical history. Histological examination is not necessary in most cases.
- Keratosis pilaris
- Lichen spinulosus
- Lichen nitidus
- Keratosis pilaris atrophicans faciei
- Juvenile pityriasis rubra pilaris
- Trichostasis spinulosa
Traumatic anserine folliculosis has a good prognosis and there may be complete resolution of the lesions after removal of the factors causing friction or pressure.
Treatment includes topical keratolytics:- 12% lactic acid 1 t/day
- 20-40% urea 1 t/day
- 6% salicylic acid 1 t/day