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(ĕp″ĭ-dūr′ō-grăm) A spinal x-ray examination that uses injected contrast to provide an outline of compressed nerve roots. This study is sometimes used in the evaluation of back pain.


(ep″i-door-os′kŏ-pē, -dūr-) [epidur(al) + -scopy] The insertion of a fiber-optic scope into the epidural space that surrounds the spinal cord to diagnose and treat chronic back pain.


(ĕp″ĭ-fŏl-lĭk″ū-lī′tĭs) [″ + L. folliculus, follicle, + Gr. itis, inflammation] Inflammation of the hair follicles of the scalp.

epigallocatechin gallate

(ĕp″ĭ-găl′ō-kăt-ĕ-chĭn găl′lāt) ABBR: EGCg, EGCG. A polyphenol compound present in green tea that inhibits the growth of cancer cells in the laboratory. Its effect on patients with cancer is unknown.


(ĕp″ĭ-găs-trăl′jē-ă) [″ + ″ + algos, pain] Pain in the epigastrium.

epigastric pain syndrome

A syndrome marked by pain or burning sensations in the mid-upper abdomen but without weight loss, vomiting, difficulties in swallowing, ulcers or other signs, symptoms, or diagnoses.

epigastric reflex

(ep″ĭ-gas′trik) [epi- + gastric] SEE: under reflex.


(ep″ĭ-gas′trē-ŭm) [epigaster + -ium] The superior central portion of the abdomen. SEE: abdominal regions; Auenbrugger sign;precordium. epigastric (ep″ĭ-gas′trĭk), adj.


(ĕp″ĭ-găs′trō-sēl) [″ + ″ + kele, hernia] A hernia in the epigastrium.


(ĕp″ĭ-jĕn′ĕ-sĭs) [″ + genesis, generation, birth] In embryology, the development of specific cells and tissues from undifferentiated cells of the early embryo.


(ep″ĭ-jĕ-net′ik) [epi- + genetic] Pert. to changes in the way genes are activated, expressed, or silenced by a cell or an organism; or to alterations in phenotype that occur without changes in the genotype.


(ĕp″ĭ-jĕ-nĕt′ĭks) Changes in the way genes are expressed that occur without changes in the sequence of nucleic acids. In mammals the most common form of epigenetic change results from methylation (the addition of methyl [-CH3] moieties) to the promoter regions of genes. Although epigenetic changes do not alter the sequence of nucleotides, they are inheritable.


(ĕp″ĭ-glŏt″ĭd-ĕk′ tō-mē) [″ + ″ + ektome, excision] Excision of the epiglottis.


(ĕp″glŏt-ĭd-īt′ĭs) Epiglottitis.


(ep″i-glot′ĭs) pl. epiglottides [Gr. epiglōttis, stem epiglōttid-] The uppermost cartilage of the larynx, located immediately posterior to the root of the tongue. It covers the entrance of the larynx when a person swallows and prevents food or liquids from entering the airway. epiglottal, epiglottic, epiglottidean (ep″i-glot′ăl, ep″i-glot′ik, ep″i-glŏ-tid′ē-ăn), ...

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