HOUSTON -- Dr. Ralph Feigin, who was considered a medical pioneer in the field of pediatric medicine, has died, KPRC Local 2 reported Thursday.

Feigin succumbed to lung cancer at the Methodist Hospital. He was 70 years old.

Feigin was one of the nation's best-known pediatricians and an expert in pediatric infectious diseases. He served as chairman of pediatrics at Baylor College of Medicine and physician-in-chief at Texas Children's Hospital.

Mark A. Wallace, president and CEO of Texas Children's Hospital, released the following statement.

"If you look at the impact that Dr. Ralph Feigin had on pediatric medicine, his reach extends far beyond a regional basis. He had an impact on pediatrics throughout the United States and even globally. He truly made a lasting impression on the world of health and the care of children. He symbolized all the great things about Baylor pediatrics and Texas Children's. It was an honor to work with him and put together the vision that has made Texas Children's the preeminent children's hospital in the country.

"Dr. Feigin was my partner and comrade for over 20 years, and words cannot express the overwhelming grief I personally feel from his passing. The influence Dr. Feigin had on our lives, both professionally and personally, is immeasurable. He was instrumental in making Texas Children's what it is today -- one of the best children's hospitals in the world. As physician-in-chief of Texas Children's and chair of the department of pediatrics at Baylor College of Medicine, Dr. Feigin's 31-year tenure here will be a legend for generations to come. He touched countless lives."

Feigin leaves behind a wife, three children and six grandchildren.