The clinical findings in a child with hemihypertrophy following the resection of a Wilms' tumor raises speculation as to whether the hemihypertrophy may have had it's genesis in embryo, as perhaps does the Wilms' tumor.
Boxer LA, Smith DL. Wilms' Tumor Prior to Onset of Hemihypertrophy. Am J Dis Child. 1970;120(6):564-565. doi:10.1001/archpedi.1970.02100110112018