When I was first diagnosed with thyroid cancer, I didn't feel any odd lumps or nodules in my neck, but I was suffering from muscle weakness, tiredness and getting constant colds. After a particularly nasty bug I noticed that my lymph nodes never seemed to go down in size.
SIRS is nonspecific and can be caused by ischemia, inflammation, trauma, infection, or several insults combined. Thus, SIRS is not always related to infection. Venn diagram showing overlap of infection, bacteremia, sepsis, systemic inflammatory response syndrome (SIRS), and multiorgan dysfunction.
The following can also cause HUS: 1  Bone marrow transplant. 2  Cancer or chemotherapy. 3  Conditions that affect the immune system, such as lupus or HIV.  Certain medicines used to treat heart disease, clotting disorders, or 1  diarrhea. Pregnancy.