HOUSTON—U.S. Rep. Joaquin Castro of Texas is recovering after undergoing cancer surgery in Houston, the congressman said in a statement on his House website.

The statement released Monday said Castro underwent successful surgery at MD Anderson Cancer Center after being diagnosed with gastrointestinal neuroendocrine tumors.

“My prognosis is good. I expect to be home recovering in Texas for several weeks before returning to Washington to continue my work,” according to the statement.

“Last summer, doctors discovered these small, slow-growing, and mostly asymptomatic tumors following a series of tests,” Castro wrote.

A gastrointestinal neuroendocrine tumor forms in the lining of the gastrointestinal tract, which is part of the digestive system, according to the National Cancer Institute.

Castro, 48, is a Democrat from San Antonio who was first elected to the U.S. House in 2012. He is currently a member of House committees on Intelligence, Foreign Affairs, and the committee on Education and Labor.