Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «P»:
Pelvic pain: Pain perceived in the area of the pelvis, the lower part
of the abdomen located between the hip bones. The term pelvic pain is most
commonly used to refer to pain arising from reproductive organs (uterus,
fallopian tubes, ovaries, vagina) in women. In this sense pelvic pain can have ...
Pelvis: The lower part of the abdomen located between
the hip bones....
Pelvis, android: There are significant differences in the anatomy of the pelvis in the female and male.
The android or male pelvis is more robust, narrower, and taller than the female pelvis. The angle of the male pubic arch and the sacrum are narrower as well.
The female pelvis is more delicate, wi...
Pelvis, female: See: Female pelvis....
Gynecoid pelvis: The gynecoid pelvis is one that is
generally characteristic of a woman in its bone structure and
therefore its shape. Gynecoid means like a woman, womanly, female.
The gynecoid pelvis is more delicate, wider and not as high as the
male pelvis. The angle of the female pubic arch...
Pelvis, male: See: Male pelvis....
Pemphigus: One of a group of chronic, relapsing autoimmune skin diseases that cause blisters and erosions of the skin and mucous membranes. The immune system mistakenly regards the cells in the skin and mucous membranes as foreign and attacks them.
Treatment may be with corticosteroids such as pred...
Pendred syndrome: A genetic disease characterized by congenital deafness, abnormality of the bony labyrinth in the inner ear, and goiter (enlargement of the thyroid gland). The congenital nerve deafness is severe to profound and is not progressive (does not get worse). The abnormality of the labyrin...
Penetrance: The likelihood a given gene will result in disease.
For example, if half (50%) of the people with the neurofibromatosis (NF) gene have the
disease NF, the penetrance of the NF gene is 0.5. ...
Penetrant trait: A genetic trait (characteristic) that is present in the genome and manifests itself in the individual. By contrast, a nonpenetrant trait is one that, although present, does not manifest itself.
If, for example, 100 people have a particular genetic trait but only 80 of them express i...
Penicillin: The most famous of all antibiotics, named for the fungal mold Penicillium notatum from which it is derived. Penicillin acts by destroying the cell wall of bacteria.
Penicillin is active against a number of types of bacteria including Streptococcus pneumoniae, Listeria, Neisseria gonorrh...
Penicillin history: The discovery of penicillin, one of the major events in the history of medicine.
In 1871 the scientist Joseph Lister by chance noticed that the mould which grows on cheese and fruit can make microbes (germs) grow weaker. He made some successful experiments on patients but did n...
Penicillin-resistant bacteria: Bacteria that are unaffected by penicillin. Such organisms can sometimes be killed using sulfa drugs, combinations of several medications, or other tactics, but some resistant infections cannot be treated successfully. The rise of penicillin-resistant bacteria is laid ...
Penicillium notatus: The species of bread mold that produces penicillin. See also: Penicillin history....
Penile: Of or pertaining to the penis....