This happens as a single or few plaques with a central depression and a marginated border. It can occur any where in the body. A skin biopsy can identify the diagnosis. A very small no of these can turn into skin cancers. This is commoner than the other types.
Numerous lesions appear all over the body.
The classic raised border is s little less prominent here. Porokeratosis Plantaris, palmaris et dissemination This is porokeratosis on the palms and soles and may spread to other areas of the body. It runs in families. Again some of these can rarely become skin cancer. The papules and plaques are arranged in a linear pattern over the body.