A 35-year-old female presents with pain and restriction
of movement of her right shoulder of several months duration. This is
interfering with her life as she finds it difficult to get dressed and brush
her hair. She is known to have insulin dependent diabetes mellitus and is a
regular attendee at the diabetic clinic.
On examination she looks generally well. On examination
of her right shoulder there is restriction of both active and passive
movements. All other joints appear normal and there is no restriction of
movement of these joints.
In this patient what is the most likely diagnosis?