Ring(s)
- aorta 747.21
 - Bandl's, complicating delivery 661.4
- affecting fetus or newborn 763.7
 
 - contraction, complicating delivery 661.4
- affecting fetus or newborn 763.7
 
 - esophageal (congenital) 750.3
 - Fleischer (-Kayser) (cornea) 275.1 [371.14]
 - hymenal, tight (acquired) (congenital) 623.3
 - Kayser-Fleischer (cornea) 275.1 [371.14]
 - retraction, uterus, pathological 661.4
- affecting fetus or newborn 763.7
 
 - Schatzki's (esophagus) (congenital) (lower) 750.3
 - Soemmering's 366.51
 - trachea, abnormal 748.3
 - vascular (congenital) 747.21
 - Vossius' 921.3