A 28-year-old woman consults for palpation of a swelling in the upper outer quadrant of the right breast. she is worried because her mother and her maternal aunt had breast cancer at ages 55 and 60 respectively. On clinical examination, you feel a round and regular swelling of 15 mm, non-adherent on the deep and superficial planes. there is no inflammation or skin retraction nearby. no suspicious lymphadenopathy is palpated in the axillary and supraclavicular lymph node areas. What examination(s) should be requested as a first intention?
A breast ultrasound
A chest x-ray
A dosage of ca 15-3
A breast MRI
A mammogram