In-depth

Causes

Klinefelter syndrome

Klinefelter syndrome is a genetic disorder that affects hormone levels in males. Discover what causes it — and what treatments are available.

Male hypogonadism

Male hypogonadism (testosterone deficiency) affects the development of male physical characteristics, sex drive, fertility and sense of well-being. Treatment may involve testosterone replacement therapy.

Tests and diagnosis

Chest X-rays

Even with today's high-tech medical devices, the basic chest X-ray remains an important tool in diagnosing various conditions. Here's a look at how it works.

CT scan

A CT scan is an imaging test that uses X-rays to produce detailed images of the inside of your body.

Mammogram

Mammography can lead to detection of breast cancer at its earliest and most treatable stage.

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Ultrasound

Ultrasound imaging uses high-frequency sound waves to create images of structures in your body.

Treatments and drugs

Mastectomy

Mastectomy — surgical removal of all breast tissue in one or both breasts — is an effective treatment for many types of breast cancer.

Jan. 02, 2014