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Rocky Mountain spotted fever (RMSF) is a bacterial infection. It’s spread by the bite of an infected tick. It most often occurs from April until September. ...

Diabetes insipidus is a condition caused by not enough antidiuretic hormone (ADH) in the body. ADH is also known as vasopressin. This is a hormone that helps the kidneys keep the correct amount of water in the body. ...

Rabies is a viral infection that attacks the nervous system. Once symptoms develop, it is often fatal. But a rabies vaccine, or a series of vaccines, given soon after contact with an animal infected with rabies can prevent the illness. ...

Meckel diverticulum is a small pouch in the wall of the intestine. It’s near where the small and large intestines meet. ...

Periventricular leukomalacia (PVL) is a softening of white brain tissue near the ventricles. The ventricles are fluid-filled chambers in the brain. These are the spaces in the brain that contain the cerebrospinal fluid (CSF). The white matter is the inner part of the brain. It ...

Developmental dysplasia of the hip (DDH) is a health problem of the hip joint. It’s when the joint hasn’t formed normally, so it doesn’t work as it should. DDH is present at birth, and it is more common in girls than boys. ...

Transient tachypnea of the newborn is a mild breathing problem. It affects babies during the first hours of life. ...

Exstrophy of the bladder is when a baby’s bladder has grown inside out and is sticking through the wall of the belly (abdomen). The bladder can be seen in the front of the child’s lower belly. Epispadias is a problem often seen with exstrophy of ...

Posterior urethral valves are a problem with the urethra in a boy. The urethra is the tube that drains urine from the bladder to the outside of the body. Posterior urethral valves are small leaflets of tissue in the urethra. ...

Systemic lupus erythematosus (SLE or lupus) is a disease that causes your body’s immune system to attack its own cells and tissues. It causes episodes of inflammation to various parts of the body. It can affect your joints, tendons, and skin. It can affect blood ...