1. From Surgical Pathology, Department of Pathology, Memorial Sloan-Kettering Cancer Center, New York, New York (Drs Hameed and Tang); the Department of Pathology, Oregon Health & Science University, Portland (Dr Corless); the Center for Sarcoma and Bone Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts (Dr George); the Department of Pathology, Brigham and Women's Hospital, Boston (Dr Ho