What Is Involuting Keratoacanthoma?

The rapid evolution of a KA may be divided into a proliferative stage, a fully developed tumor, and an involuting stage. Within weeks it develops from a rapidly growing, firm, smooth nodule into a mature bud or dome-shaped tumor with a central keratotic core that finally degenerates into an involuting keratinous mass.

Is a keratoacanthoma benign or malignant?

Keratoacanthomas are common self limited squamous proliferations. They have been considered a benign neoplasm with involution and complete resolution within few months.

What type of cancer is keratoacanthoma?

Keratoacanthomas are thought to be a type of squamous cell skin cancer. They typically have a crater-like appearance with a slightly elevated lesion and a thick crust.