Pregnancy coexisting with evolutive malignant blood disease (Hodgkin's
disease, acute leukemia, non-Hodgkin's lymphoma, chronic myeloprolife
rative disorder) is a therapeutic dilemma because of possible adverse
reactions associated with the use of cytostatic agents. Therapeutic ab
ortion, when needed, must be proposed only after a careful evaluation
of the following parameters: the emergency of treatment, the prognosis
of the disease, the term of pregnancy, the risks of therapy for the f
oetus and the mother, and the psychosocial context. From the clinical
data published so far, the teratogenicity of cytostatic drugs seems to
be minimal after the second trimester, and the outcome of pregnancy i
s often favorable, whatever the hemopathy. Radiation therapy must be u
sed very cautiously and only in supradiaphragmatic areas. An overview
of specific specific problems is done for each category of malignant b
lood disease.