HOUSTON (June 29,2012)--The University of Texas’ M.D. Anderson Cancer Center is notifying patients and staff after the theft of a computer containing personal data on about 30,000 patients from the home of a doctor.

Investigators say the theft of the unencrypted laptop computer happened April 30.

The information it contains includes names, treatment information and Social Security numbers.

M.D. Anderson spokesman Dan Fontaine said steps are being taken to encrypt all of the center's computers and credit monitoring services are being offered to affected individuals.