Partial deletion of the long arm of chromosome no. 13.

A case of partial deletion of chromosome No. 13 identified by G banding as 46, XX, del(13)(q21--ater) is reported in an infant with severe microcephaly, microphthalmos, talipes calcaneovalus, and a single crease on each of the little fingers. A review of other cases of chromosome No. 13 deletion that were identified by banding is presented and the correlation between clinical features and deletion of specific bands is discusses.