Benign follicular tumors

Area of Science:

• Dermatopathology
• Oncology
• Genetics

Background:

• Benign follicular tumors are neoplasms with hair follicle differentiation.
• While typically solitary and dermatologically relevant, multiple lesions can indicate underlying cancer syndromes.
• Understanding hair follicle embryology and histology is crucial for diagnosing these tumors.

Purpose of the Study:

• To review the clinicopathological features and differential diagnosis of benign follicular tumors.
• To discuss syndromes associated with multiple follicular tumors.
• To emphasize the dermatologist's role in early detection and management.

Main Methods:

• Histological examination of benign follicular tumors.
• Clinicopathological correlation.
• Review of syndromes associated with multiple follicular tumors.

Main Results:

• Detailed microscopic structure of normal hair follicle provided as a diagnostic basis.
• Key benign follicular tumors discussed: dilated pore of Winer, trichilemmoma, trichoblastoma, pilomatricoma, etc.
• Syndromes like Cowden, Birt-Hogg-Dubé, and Rombo highlighted as associated with multiple follicular tumors.

Conclusions:

• Diagnosis of follicular tumors relies on histology.
• Recognizing multiple follicular tumors is vital for identifying patients at risk for visceral neoplasms.
• Dermatologists are pivotal in early detection, referral, and genetic counseling for these patients.