Dr. Monika Aplyn and her husband, Eric, have listed for sale a four-bedroom, 1.5-bath home at 64 Arundel Place in Clayton for $550,000.

The 2,084-square-foot house, which was built in 1922, is in the East of Hanley Road neighborhood. Nicki Herington of Sotheby’s International Realty is the listing agent.

Dr. Aplyn is an emergency medicine physician and internist in St. Louis.

She earned her M.D. at Rheinisch-Westfalische Technische Hochschule Faculty of Medicine in Germany and trained in internal medicine at St. Luke’s Hospital.

Mr. Aplyn has worked as a lead at Sector 4 Technology in St. Louis.

There were 204 home sales in Clayton in 2008, with a median sales price of $570,000.

Address: 64 Arundel Place