Successful treatment of infundibulofolliculitis with topical tretinoin. Report of a case

Disseminated and recurrent infundibulofolliculitis in children in Mexico

“…The described clinical findings are confined to the skin. 3,8,9 Our patients, three children from tropical areas of Mexico with high temperatures and humidity, presented with similar papular eruptions on trunk in all three children, and extremities in one child, similar to those described in the literature. The patient with the longest clinical course displayed hypopigmented macules in addition to the papular rash.…”

“…Occasionally, the papules are topped by a thin, loose white scale. The described clinical findings are confined to the skin 3,8,9 . Our patients, three children from tropical areas of Mexico with high temperatures and humidity, presented with similar papular eruptions on trunk in all three children, and extremities in one child, similar to those described in the literature.…”

“…The age at presentation varies between 21 and 55 years old in most cases, although it has also been described in pediatric patients as young as 2 to 6 years of age. 1,[3][4][5]7,8 Regarding topography, the lesions are mostly seen on the trunk. Abdomen, back, chest, as well as the neck, and proximal extremities may also be involved.…”

“…Rarely the condition has been limited to a single zone of the body, such as the neck. 3,5,8 The eruption has been characterized by an extensive involvement of multiple, uniform, bilateral, and 1-2-mm skin-colored follicular papules with occasional erythema. Hyper-or hypopigmentation can be seen surrounding the follicular openings.…”

“…Some authors consider DRIF as a subset of atopic dermatitis, while others have disputed this theory based on the lack of family history of atopy, the absence of identified allergens, and the lack of response to topical corticosteroids 3 . Other theories categorize DRIF as a variant of follicular eczema, along with lichen spinulosus and juxta‐clavicular beaded lines 3 . The pruritus and lymphocytic, spongiotic histology suggest a delayed hypersensitivity response involving the most superficial part of the follicle 4 .…”