The vast majority of glucocorticoid activity in most mammals is from cortisol, also known as hydrocortisone. Corticosterone, the major glucocorticoid in rodents, is another glucocorticoid.
Men who test negative for a known breast cancer gene abnormality have the same very low risk of developing breast cancer as men in the general population. Whether you are a woman or a man, testing negative also means that you could not have passed the genetic abnormality on to your children.
When the test incorrectly indicates that HIV is absent in an infected person, this is called a false negative. Positive or negative means that the doctor looked for substances the body produces to fight the HIV virus, but not the virus itself.