Tumor of follicular infundibulum

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Infundibulomatosis

Tumor of Follicular Infundibulum is a rare skin condition characterized by benign tumors that originate from the infundibular part of the hair follicle. This condition is often considered within the spectrum of epidermal nevus syndromes and is of particular interest in the field of dermatology.

Etiology and Pathogenesis

The exact cause of Tumor of Follicular Infundibulum is not well understood. It is believed to be a benign proliferation of the infundibular epithelium of the hair follicle. The pathogenesis remains unclear, but it is not associated with any known genetic mutations or environmental factors.

Clinical Features

Tumor of Follicular Infundibulum typically presents as a solitary, flat, or slightly elevated, white or skin-colored plaque. It is most commonly found on the face, neck, or scalp. The lesions are usually asymptomatic and have a slow growth pattern. Multiple lesions may occur and are sometimes associated with systemic diseases, but this is rare.

Diagnosis

The diagnosis of Tumor of Follicular Infundibulum is primarily based on histopathological examination. Characteristic findings include a well-circumscribed lesion with a proliferation of small, keratin-filled cysts connected to the epidermis. The presence of a "church spire" pattern, resembling the architectural spire, is considered diagnostic. Immunohistochemistry may aid in the diagnosis but is not routinely required.

Treatment

Given its benign nature, treatment of Tumor of Follicular Infundibulum is not always necessary. When treatment is desired for cosmetic reasons or due to symptomatic lesions, surgical excision is the most definitive approach. Other modalities, such as cryotherapy or laser ablation, have been used with varying degrees of success.

Prognosis

The prognosis for Tumor of Follicular Infundibulum is excellent, as it is a benign condition. However, recurrence after treatment can occur, especially if the lesion is not completely excised.

Epidemiology

Tumor of Follicular Infundibulum is a rare condition, with a limited number of cases reported in the literature. It can occur in individuals of any age but is most commonly diagnosed in adults. There is no known gender or racial predilection.