Differential Diagnosis for Corn vs Ulcer of Foot
- Single most likely diagnosis:
- Corn: This is the most likely diagnosis given the presentation of a localized, thickened area of skin, often caused by repeated pressure or friction.
- Other Likely diagnoses:
- Callus: Similar to a corn, but typically larger and less defined, often found on the heel or ball of the foot.
- Blister: A fluid-filled lesion caused by friction or pressure, which could be mistaken for an early ulcer.
- Ingrown toenail: A condition where the nail grows into the surrounding skin, causing pain, redness, and swelling.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.):
- Diabetic foot ulcer: A serious complication of diabetes that can lead to infection, gangrene, and amputation if left untreated.
- Ischemic ulcer: A type of ulcer caused by poor blood flow, which can be a sign of underlying peripheral artery disease.
- Infection (e.g., cellulitis, abscess): Bacterial or fungal infections that can spread rapidly and cause serious complications if not treated promptly.
- Rare diagnoses:
- Plantar wart: A viral infection that causes a thickened area of skin on the sole of the foot.
- Keratoderma: A group of rare genetic disorders that cause thickening of the skin on the feet and hands.
- Neuroma: A benign growth of nerve tissue that can cause pain, numbness, and tingling in the foot.