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Diseases & conditions A-Z List

Diseases & Conditions A-Z List - «P»:

  1. Pupil - white spots Pupil - white spots
    White spots in the pupil is a condition that causes the pupil of the eye to look white instead of black. Considerations The pupil of the human eye is normally black. In flash photographs the pupil may appear red, an effect called "red eye." This is also called the "red reflex" by health care provid...
  2. Purpura Purpura
    Purpura is purple-colored spots and patches that occur on the skin, organs, and in mucus membranes, including the lining of the mouth. Considerations Purpura occurs when small blood vessels under the skin leak. When purpura spots are very small, they are called petechiae. Large purpura are called e...
  3. Pustules Pustules
    Pustules are small, inflamed, pus-filled, blister-like lesions on the skin surface. Considerations Pustules are common in acne. They may occur anywhere on the body, but are most commonly seen on the face, shoulders, back, and over the breastbone, and in areas of increased sweating such as the groin...
  4. Pyloric stenosis Pyloric stenosis
    Pyloric stenosis is a narrowing of the pylorus, the opening from the stomach into the small intestine. Causes Normally, food passes easily from the stomach into the duodenum (the first part of the small intestine) through a valve called the pylorus. In pyloric stenosis, the muscles of the pylorus a...
  5. Pyloroplasty Pyloroplasty
    Pyloroplasty is surgery to widen the opening in the lower part of the stomach (pylorus) so that the stomach contents can empty into the small intestine (duodenum). See: Pyloric stenosis Description The surgery is done while you are under general anesthesia (asleep and pain-free). The surgeon makes...
  6. Pyogenic granuloma Pyogenic granuloma
    Pyogenic granulomas are small, reddish bumps on the skin that bleed easily due to an abnormally high number of blood vessels. Causes The exact cause of pyogenic granulomas is unknown, but they frequently appear following injury. They often occur on the hands and arms or face. Because these lesion...
  7. Pyogenic liver abscess Pyogenic liver abscess
    Pyogenic liver abscess is a pus-filled area in the liver. Causes There are many potential causes of liver abscesses, including: Abdominal infection such as appendicitis, diverticulitis, or a perforated bowel Infection in the blood Infection of the liver secretion (biliary) tract Recent endoscopy ...
  8. Pyruvate kinase Pyruvate kinase
    Pyruvate kinase is an enzyme found in red blood cells that helps change sugar in the blood (glucose) to energy when oxygen levels are low. This article discusses the test to measure the level of pyruvate kinase in your blood. How the Test is Performed Blood is typically drawn from a vein, usually f...
  9. Pyruvate kinase deficiency Pyruvate kinase deficiency
    Pyruvate kinase deficiency is an inherited lack of the enzyme pyruvate kinase, which is used by red blood cells. Without this enzyme, red blood cells break down too easily, resulting in low levels of these cells (hemolytic anemia). Causes Pyruvate kinase deficiency is passed down as an autosomal re...