Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «P»:
Polysomnography is a sleep study. A sleep study monitors you as you sleep, or try to sleep.
There are two states of sleep:
Rapid eye movement (REM) sleep
Non-rapid eye movement (NREM) sleep
REM sleep is associated with dreaming. Your body muscles (except your eyes and lungs) do not move during thi...
Poor feeding in infants
Poor feeding is when an infant has a lack of interest in feeding or a problem receiving the proper amount of nutrition.
Poor feeding is a nonspecific symptom seen in newborn and young infants. It can result from many conditions, including infection, metabolic disorders, genetic disor...
Porphyrias are a group of rare disorders passed down through families, in which an important part of hemoglobin, called heme, is not made properly. Heme is also found in myoglobin, a protein found in certain muscles.
Normally, the body makes heme in a multi-step process. Porphyrins are made ...
Porphyrins - blood
Porphyrins are a group of chemicals that help form many important substances in the body, including hemoglobin, the protein in red blood cells that carries oxygen in the blood.
This article discusses the test to measure the total amount of porphyrins in your blood.
See also: Porphyrins - urine
Porphyrins - urine
Porphyrins help form many important substances in the body including hemoglobin, the protein in red blood cells that carries oxygen in the blood.
Porphyrins can be found in urine. A urine porphyrins test measures the amount of porphyrins in the urine.
How the Test is Performed
A 24-hour urine sampl...
A port-wine stain is a birthmark in which swollen blood vessels create a reddish-purplish discoloration of the skin.
Port-wine stains occur in about 3 out of 1,000 people.
Port-wine stains rarely may be a sign of Sturge-Weber syndrome or Klippel-Trenaunay-Weber syndrome.
Portacaval shunting is a treatment for high blood pressure within a vein that flows into the liver. Such high blood pressure is called portal hypertension.
Portacaval shunting is a major operation. The procedure requires a surgical cut in the belly area (abdomen). The surgeon makes a co...
Post surgical pain treatment
How is pain treated after surgery?
There are many types of pain medicines. Depending on the surgery and the patient's health, a single medication or combination of medications may be used.
Studies show that patients who use pain medication (such as narcotics) early and aggressively...
Post-splenectomy syndrome is a group of symptoms and signs that frequently occur after surgical removal of the spleen (splenectomy).
Destruction of red blood cells
Increased susceptibility to severe infections, especially with organisms such as Streptococcus pneumoniae and Neisseri...
Post-streptococcal glomerulonephritis (GN)
Post-streptococcal glomerulonephritis (GN) is a disorder of the kidneys that occurs after infection with certain strains of Streptococcus bacteria.
Post-streptococcal GN is a form of glomerulonephritis. It is the result of an infection, not of the kidneys, but of a completely different area,...
Post-traumatic stress disorder
Post-traumatic stress disorder is a type of anxiety disorder. It can occur after you've seen or experienced a traumatic event that involved the threat of injury or death.
Post-traumatic stress disorder (PTSD) may occur soon after a major trauma, or it can be delayed for more than 6 months af...
Posterior cruciate ligament (PCL) injury
A posterior cruciate ligament injury is a partial or complete tearing or stretching of any part of the posterior cruciate ligament (PCL).
Your doctor will perform a physical examination to check for signs of PCL injury. This includes moving the knee joint in various ways.
Posterior fossa tumor
Posterior fossa tumor is a type of brain tumor located in or near the bottom of the skull.
The posterior fossa is a small space in the skull, found near the brain stem and cerebellum. The cerebellum is the part of the brain responsible for movement, balance, and coordination.
If a tumor grow...
Posterior tongue carcinoma
A posterior tongue carcinoma is a cancerous growth (tumor) located on the back (posterior) part of the tongue.
See: Oral cancer
Tongue cancer - posterior
Postherpetic neuralgia is pain in the area where a shingles infection once occurred. The pain may last for months or years.
Postherpetic neuralgia occurs when the nerves have been damaged after an outbreak of shingles. Shingles is caused by the varicella zoster virus, the same virus that cau...