Determination of low testosterone may require more than one blood test. A normal total testosterone reading may not necessarily indicate that a man has normal levels of free testosterone. For example, some men with increased levels of SHBG and low blood levels of free testosterone may have normal levels of total testosterone. Therefore, labs often measure the total testosterone levels and its components. Because low testosterone levels may affect bone mass, the doctor may want to assess any bone loss with bone density testing.
Genetic testing can confirm the presence of an inherited condition.
Two examination procedures are most common, and neither penetrates the skin. Magnetic resonance imaging, or MRI, uses a combination of radio waves, high intensity magnetic fields and computer technology to produce images of the body's interior.