<Tr> <Th> Specialty </Th> <Td> Rheumatology </Td> </Tr> <Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> Inclusion body myositis (IBM) is an inflammatory muscle disease characterized by slowly progressive weakness and wasting of both distal and proximal muscles, most apparent in the muscles of the arms and legs . There are two types: sporadic inclusion body myositis (sIBM), which is more common, and hereditary inclusion body myopathy (hIBM). </P> <P> In sporadic inclusion body myositis (MY - oh - sigh - tis), two processes, one autoimmune and the other degenerative, appear to occur in the muscle cells in parallel . The inflammation aspect is characterized by the cloning of T cells that appear to be driven by specific antigens to invade muscle fibers . The degeneration aspect is characterized by the appearance of holes in the muscle cell vacuoles, deposits of abnormal proteins within the cells and in filamentous inclusions (hence the name inclusion body myositis). </P>

What does ibm stand for in medical terms