BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
Keratoacanthoma. Light micrograph of a section through a keratoacanthoma nodule. The cause of these lesions is unknown but they have many features of a viral condition. A localised proliferation of squamous cells (light pink) have produced the nodule, with a central crater containing a mass of keratin (dark pink). The peripheral epidermis is normal and the dermis shows a chronic, heavy infiltration of inflammatory cells.
Model release not available. Property release not required.