| hepatic triad | Branches of the portal vein, hepatic artery, and the biliary ducts bound together in the perivascular fibrous capsule or portal tract as they ramify within the substance of the liver. Synonym: hepatic triad, triad. (05 Mar 2000) |
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| Hull's triad | <clinical sign> The association of diastolic gallop, anasarca, and small pulse pressure. (05 Mar 2000) |
| Hutchinson's triad | Parenchymatous keratitis, labyrinthine disease, and Hutchinson's teeth, significant of congenital syphilis. (05 Mar 2000) |
| triad | The junction between the T tubules and the sarcoplasmic reticulum in striated muscle. (18 Nov 1997) |
| Kartagener's triad | <syndrome> The trio of sinusitis, bronchitis and situs inversus (lateral reversal of the position all organs in the chest and abdomen with the heart and stomach on the right, the liver on the left, etc.--opposite or inverted from their usual position). (12 Dec 1998) |
| Fallot's triad | Combination of pulmonary valve stenosis and atrial septal defect with right ventricular hypertrophy. (12 Dec 1998) |