Conditions & Treatments

In hypertrophic cardiomyopathy, the muscle of the heart becomes thicker than normal, obstructing blood flow to the rest of the body. ...

Hyphema is blood in the front (anterior) chamber of the eye. This is located between the clear front part of the eye (cornea) and the colored part of the eye (iris). ...

Hypocalcemia is when a person doesn't have enough calcium in the blood. In babies, it’s called neonatal hypocalcemia. ...

Hypoglycemia is when the level of sugar (glucose) in the blood is too low. Glucose is the main source of fuel for the brain and the body. ...

Hypoglycemia is when the level of sugar (glucose) in the blood is too low. Glucose is the main source of fuel for the brain and the body. In a newborn baby, low blood sugar can happen for many reasons. It can cause problems such as ...

Hypoparathyroidism is when the parathyroid glands don’t make enough parathyroid hormone. The parathyroid glands are 4 tiny glands on the thyroid. ...

Hypopituitarism means that the pituitary gland is not working normally. The pituitary gland is a pea-sized gland located at the base of the brain. It’s the master endocrine gland in the body. ...

Hypoplastic left heart syndrome (HLHS) is a group of defects of the heart and large blood vessels. A child is born with this condition (congenital heart defect). It occurs when part of the heart doesn't develop as it should during the first 8 weeks of ...

Hypoplastic thumb, also known as thumb hypoplasia, is a spectrum of birth defects of the thumb varying from small defects to complete absence of the thumb. ...

Hypospadias is a problem where the opening of the urethra is not at the tip of the penis. As the baby grows in the uterus, the tissue on the underside of the penis that forms part of the urethra doesn't fully close. ...