Unidentified patients after knee replacements.

Opening intertitle indicates that the film is taken eleven and a half years after excision and prosthetic replacement of recurrent osteoclastoma (a giant cell tumour). The first patient is a middle-aged woman and footage is shot with her walking along the path in a park (soft focus and she is hard to identify); she takes the hands of two children. The second patient is a 40 year old engineer; he also walks up and down, bends, stretches and scurries and marches. Then in an interior location he walks up stairs and then down again. The third patient is a male nurse aged 34 and this footage is captured twenty-seven months after his operation. He repeats the exercises of his predeccesor on the film. The final section is of cineradiography of a knee being flexed with the prosthetic implant clearly visible.