I've run across an anthology on works of medical fiction edited by Nickianne Moody (Liverpool John Moores University) and Julia Hallam (University of Liverpool), including essays such as "Sacrificial Corpses: The Therapeutic Corpses of Agatha Christie" by Clues editorial board member Gill Plain (University of St. Andrews) and "From Coma to Chaos: Notes on the Evolution of the Medical Thriller" by Susan Aldridge. Further details here.
Another possible book of interest: The Deadly Dinner Party by Jonathan A. Edlow, an associate professor of medicine at Harvard, who examines some real-life medical mysteries. The Australian Broadcasting Co.'s Book Show interviews the author here.
About the image: Miss Marple (Margaret Rutherford) witnesses a murder in Murder, She Said (1961, dir. George Pollock)