Surgery General 3b716a46 True about cystic hygroma - A Congenital sequestration of lymphatics B Resolves spontaneouly by 5 year of age C Common in upper 1/3rd of lateral neck D All High-Yield Explanation Answer is 'a' i.e. Congenital sequestration of lymphatics "Bailey writes that spontaneous regression may occur in cystic hygroma but I am not sure whether it occurs by 5 yrs of age".