Metabolic studies appear to place him in a subgroup of atypical galactosemic patients as described by Segal et al.
This child had never exhibited any symptoms of galactosemia although he lacked galactose-1-phosphate uridyl transferase activity in his circulating red cells.
This fibroblast cell line was established by W.J. Mellman from a skin biopsy of an 8-year-old Black male with asymptomatic galactosemia.
His younger sibling, (M.W.) demonstrated the classic galactosemic picture in infancy [Cell line CHP3, ATCC CCL-132].