Cancer of Unknown Primary Origin

If you have been diagnosed with a cancer that is difficult to treat because the primary site is unknown, Memorial Sloan-Kettering Cancer Center is ready to help. Our doctors are experts in using the latest diagnostic tools to learn as much as possible about the tumor – and determine the most effective treatment.

In this section

Making an Appointment

Call 800-525-2225 Mon–Fri, 8:00 AM–6:00 PM, ET

Learn more|Watch a video|For referring physicians

Pictured: Martee Hensley
Becoming a Patient: The First Steps

If you have recently been diagnosed with cancer or a related disease, we can help you understand your treatment options.

Pictured: Martee Hensley
Pictured: Christina Maggiuli
Patient Care Facilities

We provide patient care at locations in New York City and at state-of-the-art facilities in New Jersey, Long Island, and Westchester County.

Pictured: Christina Maggiuli
Pictured: Robert Motzer
Expert Care
Our team for diagnosing and treating hard-to-diagnose tumors includes Robert Motzer, a medical oncologist.