Dr. Milton J. Layden, a retired psychiatrist, died of complications from Parkinson's disease Sunday at the Jewish Convalescent Home in Pikesville. He was 90, and lived in Northwest Baltimore and Guilford.

He practiced on the staff of the Johns Hopkins Hospital and saw patients at his office in the Wynnewood Towers Apartments on Cold Spring Lane. He wrote Escaping the Hostility Trap, a book published by Prentice-Hall in 1977.

Born in Baltimore and raised on Whittier Avenue, he was a 1930 graduate of City College, where he played on the tennis team. He continued to play tennis until about 10 years ago.

Dr. Layden earned his undergraduate degree from the Johns Hopkins University and a medical degree from the University of Maryland School of Medicine.

During World War II, he served in the Army Air Forces as a flight surgeon. He flew 30 missions over Germany and Austria. He attained the rank of captain and was awarded the Soldiers Medal.

Services are private.

He is survived by his brother, William Layden of Pikesville, and two nephews.