Inverted Follicular Keratosis: A Rare Presentation in External Ear Canal

Area of Science:

• Dermatology
• Otolaryngology
• Pathology

Background:

• Inverted follicular keratosis (IFK) is a benign skin neoplasm originating from the hair follicle infundibulum.
• IFK can clinically and pathologically mimic malignant tumors, particularly squamous cell carcinoma.
• It is sometimes considered a variant of seborrheic keratosis.

Purpose of the Study:

• To report a rare case of inverted follicular keratosis in the external auditory canal.
• To describe the successful surgical management of this lesion.
• To emphasize the importance of accurate diagnosis and treatment.

Main Methods:

• A case presentation of a 26-year-old male with an external auditory canal mass.
• Diagnostic confirmation of inverted follicular keratosis via histopathology.
• Surgical excision using an endoscopic transcanal approach.
• Reconstruction with a temporalis fascia graft.

Main Results:

• The patient presented with a soft tissue mass in the external auditory canal.
• Histopathological examination confirmed the diagnosis of inverted follicular keratosis.
• Endoscopic transcanal excision and temporalis fascia graft reconstruction were performed successfully.
• The patient showed no signs of recurrence during follow-up.

Conclusions:

• Inverted follicular keratosis is a rare but important differential diagnosis for external auditory canal masses.
• Endoscopic transcanal excision is an effective treatment modality.
• Prompt diagnosis and surgical intervention can lead to favorable outcomes.