VTN and myeloid sarcoma: Immunolabelling for one or more complement protein was present on myelin, intact or with a fragmented or disrupted appearance in 64.3% of MS sections compared to 36.4% of neurological control sections and 28.6% of non-neurological control sections (comparison of myelin immunolabelling in MS versus non-neurological controls; p = 0.035, Additional file 5: Figure S4).