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Periventricular Leukomalacia (PVL) in Children

Periventricular leukomalacia (PVL) is a softening of white brain tissue near the ventricles. The ventricles are fluid-filled chambers in the brain.

Persistent Depressive Disorder in Children

Persistent depressive disorder is a type of depression. A child with this disorder has a low, sad, or irritable mood for at least 1 year.

Persistent Pulmonary Hypertension in the Newborn

Persistent pulmonary hypertension (PPHN) happens in newborn babies. It occurs when a newborn’s circulation changes back to the circulation of a fetus. When this happens, too much blood flow bypasses the baby’s lungs. This is sometimes ...

Peyronie Disease

Peyronie disease causes hard, flat plaque to form under the skin on the tissue of the penis. The plaque often starts as an inflammation that may develop into scar tissue. It can cause pain and a sharp curve in the penis during erections.

PFAPA Syndrome

PFAPA (Periodic Fever, Aphthous Stomatitis, Pharyngitis, Adenitis) is a childhood syndrome that affects both boys and girls. It causes repeated episodes of fever, mouth sores, sore throat, and swollen lymph nodes. PFAPA usually starts in...

Pharyngeal Cancer

The oropharynx is the space in the back of the mouth, sometimes called the back of the throat. The base of the tongue, parts of the tonsil, the back of the soft palate, and the uvula are all located in the oropharynx. The oropharynx is ...

Pharyngitis and Tonsillitis

Pharyngitis and tonsillitis are infections that cause inflammation. If the tonsils are mainly affected, it is called tonsillitis. If the throat is mainly affected, it is called pharyngitis. These infections are spread by close contact ...

Pharyngitis and Tonsillitis in Children

Pharyngitis is redness, pain, and swelling of the throat (pharynx). Tonsillitis is inflammation of the tonsils. The tonsils are a pair of tissue masses on either side of the back of the throat. They are part of the immune system, the ...

Phenylketonuria (PKU) in Children

Phenylketonuria (PKU) is a rare metabolic disorder. Children with PKU can't process an amino acid called phenylalanine. Phenylalanine is in many common foods.

Pheochromocytoma in Children

Pheochromocytoma is a tumor of the adrenal glands. The tumor makes hormones called epinephrine and norepinephrine. This leads to an excess of the hormones in the body. These hormones help manage heart rate and blood pressure, and they ...

Pheochromocytoma: An Adrenal Gland Tumor

A pheochromocytoma is a rare type of tumor. It grows in the middle of an adrenal gland. A pheochromocytoma causes the adrenal glands to make too much of the hormones epinephrine and norepinephrine. These hormones help keep your heart ...

Phimosis and Paraphimosis in Children

Phimosis and paraphimosis are problems with the foreskin of the penis. Phimosis is when a foreskin can’t be pulled down (retracted) from the tip of the penis. Paraphimosis is when the foreskin is retracted but can’t move back up.

Phobias in Children

A phobia is an excessive fear of an object or situation. It's a fear that lasts for at least 6 months. It is a type of anxiety disorder. Here's what you need to know.

Photodynamic Therapy for Age-Related Macular Degeneration

Photodynamic therapy uses lasers and a special medicine that works when exposed to a type of light. It is done to treat age-related macular degeneration (AMD).

Photosensitive Seizures

Photosensitive seizures are triggered by flashing or flickering lights. These seizures can also be triggered by certain patterns such as stripes. Photosensitive seizures can fall under several categories, including tonic-clonic, absence,...

Physical Therapy - Breast Cancer

Most patients recover quickly after breast cancer surgery and have no lingering problems. When problems do occur, they include difficulty moving the arm due to pain or tightness, mild weakness, which may be due to discomfort, and ...

Pilocytic Astrocytoma

Pilocytic astrocytoma (PA) is a slow-growing type of brain tumor. These tumors are often benign or noncancerous. This means that the growth doesn't spread to other parts of the body.

Pilomatrixoma in Children

A pilomatrixoma (PEE-lo-may-trick-SO-mah) is a slow-growing, hard lump found under the skin. It is most common on the face and neck, but it may be on other parts of the body. A pilomatrixoma is usually a single lump, but occasionally, ...

Pilon Fracture of the Ankle

A pilon fracture is a type of break of the shinbone (tibia) that happens near the ankle. Most of the time, it involves breaks in both the tibia and fibula of the lower leg. The lower ends of these bones make up part of the ankle.

Pinched Nerve

Radiculopathy, commonly called pinched nerve, often occurs in the low back.

Pinched Nerve

Radiculopathy, commonly called pinched nerve, often occurs in the lower back.

Pineal Tumor

A pineal tumor is a tumor of the pineal gland in your brain.This gland secretes a substance called melatonin that affects your sleep-wake cycles. These are very rare tumors. They happen most often to children and adults younger than 40.

Piriformis Syndrome

Piriformis syndrome is a condition in which the piriformis muscle, located in the buttock region, spasms and causes buttock pain. The piriformis muscle also can irritate the nearby sciatic nerve and cause pain, numbness and tingling ...

Pituitary Adenomas

The pituitary gland is a small oval gland at the base of the brain. It controls most of our hormones. These control thyroid activity, the monthly cycle in women, sex drive, growth in children, adrenal gland activity, urine output, the ...

Pituitary Cancer

The pituitary gland is a pea-sized, reddish gray organ in the center of the brain, just above and behind the nose. It regulates various hormones that affect most basic bodily functions. Disorders of the pituitary gland include Cushing's ...

Pituitary Gland Failure (Pituitary Apoplexy)

Pituitary gland failure or apoplexy is the sudden failure of the pituitary gland. This can happen because of severe bleeding or a loss of oxygen to the tissues of the pituitary gland causing tissue death. These events can happen either ...

Pituitary Tumor Overview

Learn whthe pituitary gland does, and what happens when a tumor forms there.

Pituitary Tumors

Most pituitary tumors are not cancer (benign). But they can cause the pituitary to make too few or too many hormones, causing problems in the body. Here's what you should know.

Pityriasis Rosea

Detailed information on pityriasis rosea, including causes, symptoms, diagnosis, and treatment.

Pityriasis Rosea in Children

Pityriasis rosea is a mild, common rash. It causes the skin to become scaly, pink, and inflamed. The rash can last from 1 to 3 months and usually leaves no lasting marks. This rash is not contagious.

Showing 61 - 90 of 186 results.
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