Onconephrology
Onconephrology ( from the Ancient Greek onkos ( ὄγκος ) meaning bulk , mass , or tumor , nephros ( νεφρός ) meaning kidney , and the suffix -logy ( -λογία ) , meaning "study of" ) is a burgeoning new specialty in nephrology that deals with the study of kidney diseases in cancer patients . 
<triplet> kidney diseases <subj> nephrology <obj> health specialty