Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «P»:
Patellar tendonopathy: See: Patellar tendonitis....
Patellectomy: An operation to remove the
Joint, patellofemoral: One of the knee joints. The knee has three parts. The thigh bone (femur) meets the large shin bone (tibia) forming the main knee joint. This joint has an inner (medial) and an outer (lateral) compartment. The kneecap (patella) and the femur form a third joint, called the patel...
Patellofemoral syndrome (PFS)
Patellofemoral syndrome (PFS): The commonest
cause of chronic knee pain, PFS characteristically causes
vague discomfort of the inner knee area, aggravated
by activity (running, jumping, climbing or descending
stairs) or by prolonged sitting with knees in a moderately
bent position (the so-called...
Patent (adjective): Open, unobstructed, affording free passage.
Thus, for example, the bowel may be patent (as opposed to obstructed).
Pronounced "pa-tent" with the accent on the first syllable.
Patent (noun): A device giving exclusive control and
possession. Before the commercialization of biomedical inventions, the word
"patent" in this sense had no place in a medical dictionary. Now the patent is
the foundation of the biotechnology industry. ...
Patent ductus: Failure of the ductus arteriosus, which functions in fetal life as an arterial shunt, to close on schedule at or shortly after birth. When the shunt remains open, it is said to be patent. See: Patent ductus arteriosus....
Patent ductus arteriosus
Patent ductus arteriosus: Failure for the ductus arteriosus, an arterial shunt in fetal life, to close on schedule.
Before birth, blood pumped from the heart through the pulmonary artery toward the lungs is shunted into the aorta. This arterial shunt is a short vessel called the ductus arteriosus. W...
Patent urachus: A birth defect involving the urachus, a canal connecting the bladder of the fetus with the allantois, a structure that contributes to the formation of the umbilical cord. The lumen (inside) of the urachus is normally obliterated during embryonic development, transforming the urachus ...
Paterfamilias: The male head of the family; the father figure. Paterfamilias is the Latin for father of the household. It is compounded from pater (father) + familias, which comes from familia (household), from famulus (servant, slave). The feminine counterpart is the materfamilias....
Paternal: 1. Pertaining to the father as, for example, a paternal age effect.2. Related through the father as, for example, the paternal grandparents.3. Inherited from the father as, for example, the paternal X chromosome.
Paternal age: The age of the father at the time he conceives a child. The present mean (average) paternal age is 27 years in the US population. Advanced paternal age is clearly associated with an increased risk of new mutations, a risk that rises linearly with the age of the father. See: Advanced pa...
Paterson-Kelly syndrome: See: Plummer-Vinson syndrome....
Patho-: A prefix derived from the Greek
"pathos" meaning "suffering or disease." Patho- serves as a
prefix for many terms including pathogen (disease agent),
pathogenesis (development of disease), pathology (study of
disease), etc. The corresponding suffix is -pathy....
Pathobiology: Pathology, with emphasis on the pathophysiological and pathogenetic mechanisms underlying human disease....