Normal pap but ultrasound shoes uterine thickening with polyp?

Pap smears: Pap smears allow pathologists to evaluate cells from the cervix (the outside or ectocervix and inside or endocervix). Most of the time we do not find cells from the endometrial cavity in the test slide because the pap smear collection brush should not go into the endometrium. Additional biopsies are required to evaluate endometrial pathology.