| Name |
Triad |
Disease |
| Abdominal aortic aneurysm rupture triad | Hypotension, pulsatile abdominal mass, flank pain | Abdominal aortic aneurysm |
| Achalasia triad | Increased lower esophageal sphincter (LES) tone, decreased LES relaxation, aperistalsis | Achalasia |
| Allergic triad | Eczema (atopic dermatitis), allergic rhinitis, bronchitis | Atopy |
| Alkaptonuria triad | Ochronotic arthritis, ochronotic pigmentation, urine darkens on standing | Alkaptonuria |
| Amyand's triad | Amyand's hernia, appendicitis, undescended testis | |
| Anderson triad | Subcutaneous emphysema, rapid respirations, abdominal rigidity | Esophageal rupture (likely intra-abdominal) |
| Austrian syndrome triad | Pneumonia, endocarditis, meningitis (all caused by Streptococcus pneumoniae) | Austrian syndrome |
| Beck's triad | Muffled heart sound, distended neck veins, hypotension | Cardiac tamponade |
| Bezold-Jarisch reflex (BJR) |
Apnea, bradycardia, and hypotension |
Sinus bradycardia |
| Budd–Chiari syndrome | Abdominal pain, ascites, hepatomegaly | Budd–Chiari syndrome |
| Charcot's cholangitis triad | Right upper quadrant pain, fever, jaundice | Ascending cholangitis |
| Charcot's neurologic triad | Scanning speech, intention tremor, nystagmus | Multiple sclerosis |
| Triad of congenital toxoplasmosis | Chorioretinitis, hydrocephalus, intracranial calcifications | Congenital toxoplasmosis |
| Triad of congenital rubella | Cataracts, patent ductus arteriosus, sensorineural hearing loss | Congenital rubella |
| Congestive heart failure triad | Tachycardia, tachypnea, tender hepatomegaly | Congestive heart failure |
| Cushing's triad | Bradycardia, bradypnea, hypertension | Increased Intracranial Pressure |
| Dieulafoy's triad | Hyperesthesia of the skin, exquisite tenderness and guarding over McBurney's point | Acute appendicitis |
| Dietl's crisis | Renal colic, swelling in loin which disappears after urination | Hydronephrosis |
| Fanconi syndrome triad | Aminoaciduria, proteinuria, phosphaturia | Fanconi syndrome |
| Female athlete triad | Eating disorders, amenorrhoea, decreased bone mineral density | Relative energy deficiency in sport |
| Felty triad | Rheumatoid arthritis, neutropenia, splenomegaly | Rheumatoid arthritis complication |
| Goodpasture syndrome triad | Glomerulonephritis, pulmonary hemorrhage, presence of anti-GBM antibodies | Goodpasture syndrome |
| Gradenigos triad | Sixth cranial nerve palsy, persistent ear discharge, deep seated retro orbital pain | Gradenigo's syndrome |
| Graves Disease triad | Goiter, exophthalmos, pretibial myxedema | Graves' disease |
| Halban triad |
Delay in a normal period followed by spotting, unilateral pelvic pain, and a small, tender, adnexal mass |
Corpus luteum cyst |
| Triad of opioid overdose | Respiratory depression, pinpoint pupils, CNS depression | Opioid overdose |
| Triad of granulomatosis with polyangiitis | Focal necrotizing vasculitis, necrotizing granulomas in the lung and upper airway, necrotizing glomerulonephritis | Granulomatosis with polyangiitis |
| Hakim triad[1] (Adams triad) | Urinary incontinence, gait disturbance, dementia | Normal pressure hydrocephalus |
| Quincke's Triad[2] (Triad of Sandblom) | Melena, obstructive jaundice, biliary colic | Hemobilia |
| Triad of Meigs' syndrome | Ascites, pleural effusion, benign ovarian tumor | Meigs' syndrome |
| Hemolytic–uremic syndrome triad | Anemia, thrombocytopenia, kidney failure (but see pentad of TTP below) | Hemolytic–uremic syndrome |
| Horner's syndrome triad | Ptosis (eyelid), miosis, anhydrosis | Horner's syndrome |
| Hutchinson's triad | Hutchison's teeth, interstitial keratitis, nerve deafness | Congenital syphilis |
| Kartagener syndrome triad | Bronchiectasis, recurrent sinusitis, situs inversus | Kartagener syndrome |
| Leriche's syndrome triad | Bilateral hip, thigh, and buttock claudication, impotence, symmetric atrophy of the bilateral lower extremities due to chronic ischemia | Leriche's syndrome |
| Mackler's triad | Vomiting, pain, subcutaneous emphysema | Boerhaave syndrome |
| Three C's of measles | Cough, coryza, conjunctivitis | Measles |
| Meltzer's triad | Purpura, arthralgias, weakness/myalgias | Cryoglobulinemia |
| Triad of reactive arthritis | Urethritis, conjunctivitis and anterior uveitis, arthritis | Reactive arthritis |
| Saint's triad | Gallstones, diverticulosis, hiatus hernia | |
| Samter's triad (also known as acetylsalicylic acid triad, Widal's triad, Francis' triad or aspirin triad) | Aspirin sensitivity, nasal polyps, asthma | Aspirin-exacerbated respiratory disease |
| Tetany in children triad | Stridor, carpopedal spasm, convulsions | Tetany |
| Trauma triad of death | Coagulopathy, hypothermia, acidosis | Death |
| Triad of albinism | Black locks, oculocutaneous albinism, sensorineural deafness | Albinism |
| Triad of Alport syndrome | Sensorineural deafness, progressive kidney failure, ocular anomalies | Alport syndrome |
| Triad of Behcet's syndrome | Recurrent oral ulcers, genital ulcers, iridocyclitis | Behçet's disease |
| Triad of causes of biotin deficiency | Glossitis, alopecia, dermatitis | Biotin deficiency |
| Triad of Henoch–Schönlein purpura | Palpable purpura on buttock/legs, arthralgias, abdominal pain | IgA vasculitis |
| Triad of Hypernephroma | Pain, hematuria, renal mass | Hypernephroma |
| Triad of Kwashiorkor | Growth retardation, mental changes, edema | Kwashiorkor |
| Triad of Plummer–Vinson syndrome | Iron deficiency anemia, dysphagia, esophageal webs | Plummer–Vinson syndrome |
| Triad of Renal cell carcinoma | Hematuria, palpable abdominal mass, flank pain | Renal cell carcinoma |
| Triple test | Estimation of hCG, estriol, AFP | Fetal chromosomal abnormalities |
| Trotter's triad | Conductive deafness, immobility of homolateral soft palate, trigeminal neuralgia | Nasopharyngeal carcinoma |
| Unhappy triad (Also known as O'Donoghue's triad or a blown knee) | Injury to the ACL, MCL, and meniscus (either medial or lateral) | Knee injury |
| Virchow's triad | Stasis, hypercoagulability, vessel injury | Venous thrombosis |
| Triad of Wernicke encephalopathy | Confusion, ophthalmoplegia, ataxia | Wernicke encephalopathy |
| Whipple's triad | Hypoglycaemia during attacks, resolution of symptoms upon correction of blood glucose, symptoms brought about by low glucose states. | Insulinoma |
| Triad of aortic stenosis | Chest pain, heart failure, syncope | Aortic stenosis |
| Murphy's triad | Pain, vomiting, fever | Acute appendicitis |
| Tillaux's triad | Soft fluctuant swelling in umbilical region, swelling moves perpendicular to mesentery, zone of resonance all around swelling | Mesenteric cyst |
| Rigler's triad | Small bowel obstruction, a gallstone outside the gallbladder, air in the bile ducts | Gallstone ileus |
| Wilkie's syndrome (SMA syndrome) | Chronic peptic ulcer, chronic appendicitis, chronic calcular cholecystitis | gastro-vascular disorder |