Marianne,
I had two private MRI on the GC - I was out of pocket $500 each time.
I was 48 at diagnosis (2016) - the Mammogram/ultrasound I had was reported as BiRADs 2 - the final note on it said suggest biopsy a left sided fibroadenoma at 3 o'clock or rescan in 12 months. I didn't settle for that, the report just read wrong to me and I pushed for an MRI - ten days later a 4.9 cm IDC separate lesion at 12 o'clock plus nodes came out of my left chest.
I am of normal BMI and a 12B chest so hard to say anything got lost. I do have (had) dense breast tissue - it is one of the main reasons Mammogram/ Ultrasound do not have a high specificity/sensitivity in the under 50s. At the very least MRIs should be gov subsidised in the under 50s needing screening.
I imagine I am not the only one....