Rep. Raul Grijalva (D-AZ) has been diagnosed with cancer, the Arizona Democrat announced in a statement on Tuesday.

The diagnosis comes after Grijalva, who has been a member of Congress since 2003, sought medical treatment for a “persistent cough” that was thought to be pneumonia. However, after further testing, it was discovered that the Democratic lawmaker had cancer, he said in a statement.

“This diagnosis has been difficult to process, but I am confident in the vigorous course of treatment that my medical team has developed,” Grijalva said.

“I am grateful to my family, friends and doctors for their support, and I am working hard to get healthy and return to business as usual as soon as I am able,” he added. “I appreciate your consideration, well wishes and respect for my family’s privacy during this time. My heart goes out to others struggling with cancer, and I wish everyone strength in their fight.”

CLICK HERE TO READ MORE FROM THE WASHINGTON EXAMINER

It is not immediately clear what type of cancer Grijalva was diagnosed with. However, the Arizona Democrat said he has begun undergoing treatment.

Grijalva, the ranking member on the House Natural Resources Committee and former co-chairman of the Congressional Progressive Caucus, said his office would remain open and constituent services would continue as he is treated, and he noted that he is in “regular communication” with his staff.