Pituitary infarction refers to bleeding into the pituitary gland, usually into a tumour. It causes sudden headache and vomiting and is potentially fatal.
Lupus nephritis, a hereditary kidney disease which affects the glomeruli, is caused by systemic lupus erythematosus (SLE), a systemic autoimmune disorder.
Sudeck's atrophy, also called reflex sympathetic dystrophy syndrome and complex regional pain syndrome, is long-term pain, usually after a trivial injury.
Severe acute respiratory syndrome (SARS) is a contagious lung infection which causes bleeding in the lungs and severe breathing difficulty. It can be fatal.