2nd May 2024

A 55-year-old woman presents with a non-tender lump in her right breast, discovered during a routine self-examination.

A 55-year-old woman presents with a non-tender lump in her right breast, discovered during a routine self-examination. Her sister was diagnosed with breast cancer at the age of 50. Mammography reveals a 1.5 cm lesion with suspicious characteristics in the right breast. Biopsy confirms the diagnosis of low-risk ductal carcinoma in situ (DCIS). She is postmenopausal with no other significant medical history.

Which is the most appropriate initial management?