CDKN1C and hydatidiform mole: Absence of p57kip2 in complete hydatidiform moles which is a trophoblastic proliferation abnormality suggests that p57kip2 is a very sensitive marker to differentiate between complete and partial hydatidiform mole since p57kip2 is a paternally imprinted and maternally expressed gene, it is found in partial moles but absent in complete molar pregnancies [15].