Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Barraquer-Simons syndrome ?
    ### Response:
    Barraquer-Simons syndrome, or acquired partial lipodystrophy, is characterized by the loss of fat from the face, neck, shoulders, arms, forearms, chest and abdomen. Occasionally the groin or thighs are also affected. Onset usually begins in childhood following a viral illness.
    