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(păn″ĕn-sĕf″ă-lī′ tĭs) [Gr. pan, all, + enkephalos, brain, + itis, inflammation] A diffuse inflammation of the brain.

subacute sclerosing p. ABBR: SSPE. A disease of childhood and adolescence marked by gradual and progressive intellectual and behavioral deterioration followed by seizures, muscle jerking, gait disturbances, and eventually coma. The illness is a late complication of measles infection (usually developing about 5 years after the child had measles). It has been almost completely eradicated in the U.S. as a result of universal measles vaccination. SYN: Dawson disease.


(păn-ĕn′ dō-skōp) [″ + endon, within, + skopein, to view] A cystoscope that gives a wide view of the bladder.

Paneth cells

(pah′nĕt) [Josef Paneth, Ger. physician, 1857–1890] Large secretory cells containing coarse granules, found at the blind end of the crypts of Lieberkühn (the intestinal glands). They secrete lysozyme.


1. A paroxysm of extreme agony. 2. A sudden attack of any emotion.


(pan″hī″pō-pĭ-too′ĭt-ă-rizm, -tū′) [pan- + hypopituitarism] Defective or absent function of the entire pituitary gland. SYN: pituitary cachexia; Simmonds disease.


(păn″hĭs-tĕr-ĕk′tō-mē) [″ + hystera, womb, + ektome, excision] Excision of the entire uterus including the ovaries, oviducts, and uterine cervix. SEE: hysterectomy.


(pan′ ik) [Gr. panikos, pert. to (the god) Pan] Acute anxiety, terror, or fright that is usually of sudden onset and may be uncontrollable.

homosexual p. 1. In Freudian psychiatry, fear, anxiety, aggression, or psychosis that originates in conflicts that arise from an attraction to members of one’s own gender. 2. An irrational fear of contracting illnesses from casual contact with people who have sex with members of their own gender.

panic disorder

An anxiety disorder characterized by panic attacks, e.g., agoraphobia with panic attacks.

panic value

A laboratory test result so far outside the normal range that it requires immediate notification of a health care provider.


(pan″lob′yŭ-lăr) [pan- + lobular] Pert. to all the lobes of an organ.


(păn″u-rī′ tĭs) [″ + neuron, sinew, + itis, inflammation] Generalized neuritis.


(pă-nik″yŭ-līt′ĭs) [panniculus + -it is] Inflammation of subcutaneous fatty tissue. The most common form of the inflammation is erythema nodosum. SEE: erythema nodosum.

relapsing febrile nodular nonsuppurative p. Weber-Christian disease.


(păn-ĭk′ū-lŭs) [L., a small piece of cloth] Any clothlike sheet or layer of tissue.

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