Fetal Hydantoin Syndrome is caused by:
Phenytoin
Alcohol
Tetracycline
Sodium valproate
Use of phenytoin in pregnancy can result in fetal hydantoin syndrome. It is charecterized by the presence of hypoplastic phalanges, cleft lip, cleft palate and microcephaly. Ref: Essentials of Medical Pharmacology By KD Tripathi, 5th Edition, Page 372, 374, 672; Management of Genetic Syndromes By Suzanne B. Cassidy, Judith E. Allanson.