Dr. Catherine Welsh is an oncologist practicing in Miami, FL. Dr. Welsh specializes in the care and treatment of patients with cancer. As an oncologist, Dr. Welsh manages and oversees the treatment of a cancer patient after he or she has been diagnosed with the disease. Oncologists will care for their patients throughout the course of the disease. Types of oncologists include medical oncologists, surgical oncologists, radiation oncologists, gynecologic oncologists, pediatric oncologists and hematologist oncologists.