Cowden syndrome.

Area of Science:

• Genetics and rare diseases
• Dermatology and oncology

Background:

• Cowden syndrome (CS), also known as multiple hamartoma syndrome, is an autosomal dominant disorder.
• CS is primarily caused by mutations in the PTEN gene located on chromosome 10q23.3.
• The condition exhibits variable expressivity and is characterized by the development of multiple hamartomatous neoplasms.

Observation:

• Mucocutaneous manifestations are common in CS, including trichilemmomas, oral mucosal papillomatosis, acral keratosis, and palmoplantar keratosis.
• Hamartomas can affect various organs such as the skin, gastrointestinal tract, central nervous system, eyes, and genitourinary tract.
• This report details a case of a 14-year-old female presenting with numerous oral papillomatous lesions.

Findings:

• The patient's presentation with multiple oral papillomatous lesions is consistent with the mucocutaneous features of Cowden syndrome.
• The underlying genetic basis, PTEN mutation, is strongly associated with the observed hamartomatous growths.
• Early identification of oral manifestations can be crucial for diagnosing Cowden syndrome.

Implications:

• This case underscores the importance of recognizing oral papillomatosis as a significant sign of Cowden syndrome.
• Prompt diagnosis of Cowden syndrome allows for comprehensive management and surveillance for associated cancers.
• Further research into PTEN gene function can elucidate the pathogenesis of hamartoma formation in Cowden syndrome.