Differential Diagnosis for a Wart on Finger
- Single most likely diagnosis
- Common wart (Verruca vulgaris): This is the most likely diagnosis due to the high prevalence of common warts, which are caused by the human papillomavirus (HPV). They often appear as rough, hard, or flat growths on the skin, particularly on the fingers.
- Other Likely diagnoses
- Plantar wart (Verruca plantaris): Although less common on the fingers, plantar warts can occur on the hands, especially if the individual has been in contact with someone who has plantar warts on their feet.
- Molluscum contagiosum: This is a viral infection that causes small, pearly, or flesh-colored bumps on the skin. It can be spread by direct contact with an infected person or contaminated objects.
- Keratoacanthoma: A low-grade, or sometimes benign, tumor of the skin that can resemble a wart. It often grows quickly and may resolve on its own.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Squamous cell carcinoma: Although rare, this type of skin cancer can sometimes be mistaken for a wart. It's crucial to consider this diagnosis, especially in individuals with risk factors such as prolonged sun exposure or immunosuppression.
- Melanoma: In rare cases, a melanoma can present as a pigmented lesion that might be mistaken for a wart. Early detection is critical for treatment and survival.
- Rare diagnoses
- Verrucous carcinoma: A rare, low-grade malignancy that can resemble a wart. It tends to grow slowly and can be difficult to distinguish from a benign wart without a biopsy.
- Epidermoid cyst: A benign cyst that can sometimes be mistaken for a wart, especially if it becomes inflamed or infected.
- Dermatofibroma: A benign skin growth that can appear as a firm, rough bump, potentially resembling a wart.