| IPHR | inverted polypoid hamartoma of the rectum |
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| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
| PC-IRV | pressure-controlled inverted ratio ventilation |
| inverted nipple | The turning inward of the nipple. Usually a congenital condition, but, if it occurs where it has not previously existed, it can be a sign of breast cancer. (09 Oct 1997) |
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| inverted papilloma | A mucosal tumour of the urinary bladder or nasal cavity in which proliferating epithelium is invaginated beneath the surface and is more smoothly rounded than in other papilloma's. (05 Mar 2000) |
| inverted pelvis | Split pelvis with separation at pubis. (05 Mar 2000) |
| inverted radial reflex | Flexion of the fingers without flexion of the forearm, on tapping the lower end of the radius; regarded as indicating a lesion of the fifth cervical segment of the spinal cord. (05 Mar 2000) |
| inverted reflex | Any reflex in which the usual response is reversed or does not conform to the pattern characteristic of the particular reflex. Synonym: inverted reflex. (05 Mar 2000) |
| inverted repeat | Either of two copies of a DNA sequence (such as those foundat oppositeends of a transposon) whichoccur in identical but inverted form. (09 Oct 1997) |
| frostberg inverted-three sign | <radiology> Medial retraction of 2nd portion of duodenum, pancreatic carcinoma (less than10% of carcinoma's), acute pancreatitis, postbulbar ulcer disease (12 Dec 1998) |