Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «P»:
Pseudohypoparathyroidism is a genetic disorder that is similar to hypoparathyroidism, but which results from the body's lack of response to parathyroid hormone rather than decreased production of the substance.
The parathyroid glands help control calcium use and removal by the body. They do ...
Pseudomembranous colitis is infection of the large intestine (colon) with an overgrowth of Clostridium difficile bacteria.
The Clostridium difficile bacteria is normally present in the intestine. However, it may overgrow when antibiotics are taken. The bacteria release a powerful toxin that ...
Pseudotumor cerebri is a process affecting the brain that appears to be -- but is not -- a tumor. It is often reversible.
The condition occurs more frequently in women than men, particularly in premenopausal obese women. It is rare in infants.
The cause is unknown. Certain medicines can incr...
Psoriasis is a common skin condition that causes skin redness and irritation. Most persons with psoriasis have thick, red skin with flaky, silver-white patches called scales.
See also: Guttate psoriasis
Psoriasis is a very common condition. The disorder may affect people of any age, but it ...
Psoriasis - guttate
Guttate psoriasis is a skin condition in which small, red, teardrop-shaped spots appear on the arms, legs, and middle of the body. Guttate means "drop" in Latin.
See also: Psoriasis
Guttate psoriasis is a relatively uncommon form of psoriasis. It is usually seen in patients younger than 30....
Psoriasis - resources
The following organization is a good resource for information on psoriasis:
National Psoriasis Foundation - www.psoriasis.org
Resources - psoriasis...
Psoriatic arthritis is an arthritis that is often associated with psoriasis of the skin.
Psoriasis is a common, chronic skin condition that causes red patches on the body. About 1 in 20 people with psoriasis will develop arthritis with the skin condition. In most cases, psoriasis comes befor...
Psychosis is a loss of contact with reality, usually including false beliefs about what is taking place or who one is (delusions) and seeing or hearing things that aren't there (hallucinations).
A number of substances and medical conditions can cause psychosis, including:
Alcohol and certa...
PTH stands for parathyroid hormone. It is a protein hormone released by the parathyroid gland. PTH is the most important regulator of the body's calcium and phosphorus levels.
Release of PTH is controlled by the level of calcium in the blood. Low blood calcium levels cause increased PTH to be releas...
PTH-related protein is a blood test that measures the amount of a protein molecule similar to parathyroid hormone.
How the Test is Performed
Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic...
Ptosis is also called "drooping eyelid." It is caused by weakness of the muscle responsible for raising the eyelid, damage to the nerves that control those muscles, or looseness of the skin of the upper eyelids.
Drooping eyelid can be caused by the normal aging process, a congenital abnormal...
Puberty and adolescence
Puberty is the time in which sexual and physical characteristics mature. It occurs due to hormone changes.
Adolescence is the period between puberty and adulthood.
The exact age a child enters puberty depends on a number of different things, such as a person's genes, nutrition, and gend...
Pubic lice are small, six-legged creatures that infect the pubic hair area and lay eggs. These lice can also be found in armpit hair and eyebrows.
Pubic lice are known as Phthirus pubis. Lice infestation is found mostly in adolescents.
Transmission generally occurs during sexual activity. Ho...
Pulmonary actinomycosis is a rare bacterial lung infection.
Pulmonary actinomycosis is caused by a species of bacteria normally found in the mouth and gastrointestinal tract, where they do not usually cause harm. However, poor dental hygiene and dental abscess can increase your risk for face...
Pulmonary alveolar proteinosis
Pulmonary alveolar proteinosis is a rare disease in which a type of protein builds up in the air sacs (alveoli) of the lungs, making breathing difficult.
In some cases, the cause of pulmonary alveolar proteinosis is unknown. In others, it is associated with infection or an immune problem. It...