Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Gorham's disease ?
    ### Response:
    Gorham's disease is a rare bone disorder that is characterized by bone loss (osteolysis), often associated with swelling or abnormal blood vessel growth (angiomatous proliferation). Bone loss can occur in just one bone, or spread to soft tissue and adjacent bones.
    