Successful pregnancy following continuous treatment with combination chemotherapy before conception and throughout pregnancy.

A 21-year-old woman with diffuse histiocytic lymphoma received combination chemotherapy continuously for 16 months before conception and throughout pregnancy. Procarbazine and BCNU were given for 5 months before conception and throughout the first and second trimesters, and streptozotocin was given throughout the third trimester. A male infant who was phenotypically and genotypically normal was delivered. The authors reviewed the literature regarding chemotherapeutic agents given during the first trimester of pregnancy. Although most chemotherapeutic agents are teratogenic in the animal model, the incidence of teratogenicity of chemotherapeutic agents given to humans in the first trimester of pregnancy is 12.7%. This represents a fivefold increase in teratogenicity. As yet the administration of chemotherapeutic agents in the second and third trimesters has not resulted in teratogenicity. This information may help the physician when deciding whether to treat pregnant patients with chemotherapeutic agents during the first trimester or whether to continue treatment when the patient has become pregnant while receiving these agents.