Such tumors are rare and include a wide variety of benign and malignant diseases such as bone sarcomas (such as osteosarcoma, chondrosarcoma, Ewing's sarcoma), soft tissue sarcomas (such as synovial sarcoma, liposarcoma, malignant fibrous histiocytoma), as well as metastatic cancers affecting the extremities. As these diseases can occur at any age, Dr Henshaw routinely treats pediatric and adult patients, having operated on over 2700 tumor patients in his first 18 years of practice in Washington, D.C. Dr. Henshaw sees and treats patients from the entire mid-Atlantic region, along with referred patients from around the country and the world.