Memorial Sloan Kettering Cancer Center (MSK or MSKCC) is a cancer treatment and research institution in New York City, founded in 1884 as the New York Cancer Hospital. 

MSKCC is the largest and oldest private cancer center in the world, and is one of 70 National Cancer Institute–designated Comprehensive Cancer Centers.

Its main campus is located at 1275 York Avenue, between 67th and 68th streets, in Manhattan. As one of the world's premier cancer centers, Memorial Sloan Kettering Cancer Center is committed to exceptional patient care, leading-edge research, and superb educational programs.

The close collaboration between its physicians and scientists is one of its unique strengths, enabling it to provide patients with the best care available today as it works to discover more effective strategies to prevent, control, and ultimately cure cancer in the future. Its education programs train future physicians and scientists, and the knowledge and experience they gain at Memorial Sloan Kettering has an impact on cancer treatment and the biomedical research agenda around the world.

Approximately 1,700 medical residents and Fellows are in training at MSK. There are 575 postdoctoral researchers training at MSK labs and a combined 288 PhD and MD-PhD candidates.

According to en.wikipedia