sentences:  The dermatologic subspecialty called Mohs surgery focuses on the excision of skin cancers using a technique that allows intraoperative assessment of most of the peripheral and deep tumor margins developed in the 1930s by Dr. Frederic E. Mohs.The procedure is defined as a type of CCPDMA processing.Physicians trained in this technique must be comfortable with both pathology and surgery, and dermatologists receive extensive training in both during their residency.