WAbdominal aortic aneurysm
WAortoiliac occlusive disease
WAspirin exacerbated respiratory disease
WEsophageal rupture
WBudd–Chiari syndrome
WCharcot's cholangitis triad
WCurrarino syndrome
WGradenigo's syndrome
WChronic multifocal Langerhans cell histiocytosis
WHemolytic–uremic syndrome
WInfectious mononucleosis
WLennox–Gastaut syndrome
WLöfgren syndrome
WMeningitis
WPrune belly syndrome
WReactive arthritis
WRenal cell carcinoma
WSanjad-Sakati syndrome
WToxoplasmosis
WTrauma triad of death
WTriple-A syndrome
WUnhappy triad
WVirchow's triad
WWernicke encephalopathy