IV

• endometrial carcinoma extending outside the true pelvis or involving the bladder and rectum [International Federation of Gynecologists and Obstetricians (FIGO) classification];

• ichnovirus;

• ichthyosis vulgaris;

• immunodeficiency virus;

• initial visit;

• interventricular;

• intervertebral;

• intravaginal;

• intravascular;

• intravenous;

• intraventricular;

• intravertebral;

• invasive;

• in vivo;

• in vitro;

• involvement of one or more extralymphatic organs [Ann Arbor staging system for Hodgkin disease];

• iodine value;

• iridescent virus;

• iridovirus;

• isometric virus;

• symbol for class 4 controlled substances