Memorial Sloan Kettering Cancer Center MyMSK Portal. Memorial Sloan Kettering Cancer Center (MSKCC) in New York is the world's oldest, largest private cancer centre. The centre has 471 beds and has 935 attending physicians and 2,221 nurses. In 2013, 138,338 patients were seen, there were 22,326 inpatient stays and 571,922 outpatient visits..