Blood, 1960, Vol. 16, No. 5, pp. 1546-1554.
© 1960 American Society of Hematology, Inc.
Megaloblastic Anemia Probably Caused by
Defective Utilization of Folinic Acid
FARID I. HAURANI 1,
GEORGE WANG 1, and
L. M. TOCANTINS 1
1 Charlotte Drake Cardeza Foundation, Jefferson Medical College and Hospital,
Philadelphia, Pa.
A 12 year old negro girl was studied who presented a picture of megaloblastic anemia refractory to physiologic doses of vitamin B-12 and to folic
acid. However, remission could be induced and maintained by pharmacologic
doses of vitamin B-12 (1000 µg. per week), by folinic acid or by a combination of vitamin C (or homocysteine) and folic acid. Folinic acid determinations
and the clinical response to various metabolites indicated the existence of a
metabolic defect in the utilization of folinic acid. The hereditary nature of
this defect was suggested by the fact that two siblings might have had a similar condition.
Submitted on March 16, 1960
Accepted on July 15, 1960