What is a papilloma?

Papilloma is a benign tumor characterized by papillary (finger-like) proliferation of epithelial tissue and the underlying connective tissue, either projecting outward from the surface or growing inward into the surrounding stroma. Although generally benign, papillomas carry potential risks of malignant transformation and post-treatment recurrence. So, what exactly is papilloma? The following section provides a detailed explanation.

Papillomas are epithelial-derived tumors whose pathological hallmark is marked epithelial hyperplasia. Squamous epithelium proliferates excessively outward, forming papillary projections—rounded or oval epithelial masses with centrally located loose, highly vascularized connective tissue. Papillomas commonly occur in anatomical sites such as the nasal cavity, external auditory canal, pharynx, esophagus, and mammary glands, and are typically benign. Nevertheless, clinicians must remain vigilant, as malignant transformation and recurrence after treatment remain possible. To date, no definitive etiology has been established; however, contributing factors may include environmental exposures, viral infections (particularly human papillomavirus, HPV), chronic inflammation, and allergic reactions. Therefore, annual routine physical examinations are recommended for effective prevention.

Knowledge Expansion: What Causes Human Papillomavirus (HPV) Infection?

1. Sexual Transmission

Research indicates that factors including number of sexual partners, frequency of intercourse, and having a partner with genital warts are strongly associated with HPV infection. During sexual contact with an individual carrying HPV or suffering from genital warts (condyloma acuminatum), friction can easily cause abrasion of the wart lesions on the genitalia, allowing the virus within the lesion to enter the partner’s body and thereby transmit HPV infection.

2. Vertical Transmission from Mother to Child

If an HPV-infected woman conceives without prior diagnosis or treatment, uterine contractions during labor and passage of the fetus through the birth canal may expose the newborn to maternal HPV, increasing the risk of neonatal HPV-related conditions—including condyloma acuminatum. Additionally, some individuals acquire HPV infection through everyday contact—such as sharing toilets, undergarments, underwear, or bath towels—with infected persons, due to inadequate personal hygiene practices.

The above provides an overview of what papilloma is. We hope this information proves helpful to you.