Despite compelling data from trials like PATINA, some patients with ER+/HER2+ breast cancer refuse maintenance endocrine therapy due to side effects. This highlights a real-world gap between clinical trial evidence and patient adherence, forcing oncologists to navigate patient preferences against optimal treatment protocols.

Breast cancer specialists advocate for patients to meet the entire care team before surgery to create a comprehensive plan and reduce anxiety. However, insurance carriers often create administrative and financial barriers that prevent these coordinated, upfront consultations, leading to a more fragmented and stressful patient experience.

Clinicians may counsel patients towards therapies with lower efficacy if the dosing schedule is more convenient (e.g., quarterly). The rationale is that a lack of response is evident quickly, allowing a rapid pivot to another treatment without losing significant time or risking progression.

A patient's reminder that even clinically-graded "mild" side effects like grade 2 diarrhea can be debilitating highlights a disconnect between clinical assessment and patient experience. This underscores the need for oncologists to consider the real-world impact of toxicities, like the ability to leave the house, when choosing a treatment regimen.

When a highly effective therapy like EV Pembro was approved for 'cisplatin ineligible' patients, the definition of 'ineligible' became very elastic in practice. This demonstrates that when a new treatment is seen as transformative, clinicians find ways to qualify patients, putting pressure on established guidelines.

In the ASCENT-07 trial, investigators may have prematurely switched patients from the standard chemotherapy arm to superior, commercially available ADCs at the first hint of progression. This real-world practice can mask an experimental drug's true benefit on progression-free survival.

Even with strong data supporting targeted agents, respecting a patient's decision to refuse them due to fears about side effects is a reasonable approach. Proceeding with standard chemotherapy and immunotherapy in such cases is a valid clinical choice that prioritizes shared decision-making and patient autonomy.

New targeted therapies are often approved only for first-line use. This forces clinicians into a difficult choice: using one effective drug like a checkpoint inhibitor means forfeiting the chance to use another, like zolbetuximab, in a subsequent line of treatment, thereby losing a valuable therapeutic option.

The effective, inexpensive standard of care, gemcitabine-docetaxel ('gemdose'), is rarely used in US community practices because it is unprofitable. Clinicians openly admit to choosing more expensive, reimbursed drugs to maintain financial viability, creating a stark divide with academic centers.