What characterizes a Marjolin's ulcer?

A Marjolin's ulcer is specifically characterized by being a non-healing ulcer that suggests the presence of an underlying malignancy, typically arising in chronic wounds or scars. These ulcers often develop in areas of previously traumatized skin, such as burn scars, venous ulcers, or other long-standing lesions that have not healed properly. Over time, the persistent irritation or injury can lead to malignant transformation, usually resulting in a form of squamous cell carcinoma.

Recognizing the characteristics of a Marjolin's ulcer is crucial for early detection and intervention, as these ulcers may not show typical signs of malignancy until advanced. Understanding this helps clinicians distinguish them from other types of ulcers or wounds that may heal appropriately or are benign in nature.