Preleukemia
A condition in which the bone marrow does not produce enough blood cells. This condition may progress to become acute leukemia. Preleukemia also is called myelodysplastic syndrome or smoldering leukemia.
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- Premalignant
Pertaining to tissue that is not yet malignant but is poised to become malignant. Appropriate clinical and laboratory studies are designed to detect premalignant tissue while it is still in a premalignant stage. A battery of techniques are available to remove or kill the tissue, thereby preventing the development of cancer. The proper treatment method […]
- Premature baby
A baby born before 37 weeks of gestation have passed. Historically, the definition of prematurity was 2500 grams (about 5 1/2 pounds) or less at birth. The current World Health Organization definition of prematurity is a baby born before 37 weeks of gestation, counting from the first day of the Last Menstrual Period (the LMP). […]
- Premature birth
A birth that takes place before 37 weeks of gestation have passed. Historically, the definition of prematurity was 2500 grams (about 5 1/2 pounds) or less at birth. The current World Health Organization definition of prematurity is a baby born before 37 weeks of gestation, counting from the first day of the Last Menstrual Period […]
- Premature contraction of the heart
A single heartbeat that occurs earlier than normal. This phenomenon can be within normal limits, or it may represent a medically significant arrhythmia.
- Premature ejaculation
Ejecting semen from the penis, usually accompanied by orgasm, occurring sooner than a man wants during sexual activity. Premature ejaculation is characterized by a lack of voluntary control over ejaculation that interferes with optimal sexual or psychological well-being in either partner.