Described as "Chirurgus expertissimus" in an inscription on the frame, the bald, white-mustached title figure is shown with a scalpel in his left hand, overseeing a mastectomy.  
The identities of all the figures in this painting are known, except for the pair of hands at the upper left holding a pen against a chair.  Of the six figures lit in the foreground, three are engaged in work, while the one dressed in what looks like a maid's uniform appears less interested than several audience members who have stood up from their seats.  The man in the shadows on the right listening to a whisper is the painter responsible for the rest of the scene, who was added to the work by his wife.  Described as "Chirurgus expertissimus" in an inscription on the frame, the bald, white-mustached title figure is shown with a scalpel in his left hand, overseeing a mastectomy.  FTP, name this painting, reproduced on diplomas at Penn's medical school, the second of two medical scenes produced by Thomas Eakins.
The identities of all the figures in this painting are known, except for the pair of hands at the upper left holding a pen against a chair.  
The Agnew Clinic