Abstract
Malignant tumors are common causes of persistent ulceration resistant to therapy.
There are two alternative settings in which malignant ulcers are seen. In the first, an
ulcer occurs due to necrosis or breakdown of another malignant process. Frequently,
routine skin malignancies including basal cell or squamous cell carcinoma or malignant melanoma ulcerate. In addition, less common tumors including lymphomas, sarcomas, or metastatic carcinomas may present with skin ulceration. This situation is
often reason enough to obtain biopsy evaluation of unresponsive or atypical ulcers.