The percutaneous insertion of one or more balloons across a stenotic heart valve. Inflating the balloons decreases the constriction. This...

The prominent circular membranous fold at the pyloric orifice of the stomach.  

A substitute valve used to replace a diseased valve. There are two main types of prostheses: those made from biological...

A vacuole present in the cytoplasm of a secretory cell that is filled with crystalloid material.  

A pneumococcal vaccine used for active immunization of infants and toddlers. The vaccine contains antigens from 7 capsular serotypes of...

A vaccine that contains 23 of the known 83 pneumococcal capsular polysaccharides, and induces immunity against Streptococcus pneumoniae, a gram-positive...

A vaccine produced from cultures of a number of strains of the same species.  

A vaccine made either from a crude fraction of killed plague bacilli, Yersinia pestis, or synthetically from recombinant proteins. It...

A vaccine that stimulates antibody production against specific amino acid sequences, e.g., those expressed on the surface of pathogens or...

An adult uterus that resembles that of a prepubertal female.