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Overview


Keratoacanthoma (KA) is a common skin tumor. In the past it was regarded as benign, but some of these tumors have been seen to transform into squamous cell carcinoma. Keratoacanthoma is now regarded and treated by many as a malignant growth. It is characterized by very rapid enlargement, followed by a stable period, and then a slow, natural regression.



Causes

Sun exposure appears to be the major factor contributing to KAs. Various chemical carcinogens (cancer-causing ...Read the full article