Key points
- This list is a decision aid, not a rule; every item has exceptions. But each of these practices has shown harm or futility in studies or guidelines.
- Most harm comes from "keeping old habits": chemotherapy that has been replaced by a targeted drug, or tests that do not change the outcome.
Treatment
- 1
1. First-line chemoimmunotherapy (FCR, BR or chlorambucil) in CLL, especially with disrupted TP53 or unmutated IGHV
- 2
- 3
3. Chemotherapy (instead of ATRA and arsenic) in low-risk APL
ATRA with arsenic trioxide gave better event-free survival and less toxicity than ATRA with chemotherapy [7].
- 4
4. First-line chemotherapy or immunotherapy in EGFR-mutated lung cancer
First-line osimertinib increased progression-free and overall survival compared with older TKIs [8]; immunotherapy has little benefit in these patients. Know the EGFR and ALK status before treatment [17].
- 5
5. A targeted drug without testing for the target
Drugs such as cetuximab (without RAS wild type), trastuzumab (without HER2) or lung cancer TKIs (without a mutation) have no benefit and only add toxicity [2, 17].
- 6
6. Chemotherapy in solid tumours with poor performance status (ECOG 3 to 4) without evidence of benefit
In these patients, prioritise supportive and palliative care, unless the disease is highly treatment-sensitive (for example lymphoma, germ cell tumours, small cell lung cancer) or the weakness is caused by the cancer itself and is reversible [1].
Tests and imaging
- 1
7. PET, CT or bone scan for staging early breast cancer (stage 0 to 2) or low-risk prostate cancer
The chance of finding metastases is very low, and false findings lead to biopsies and delays [1].
- 2
8. Tumour markers and routine imaging in the follow-up of treated breast cancer without symptoms
Finding an asymptomatic recurrence earlier has not improved survival; examination and yearly mammography are enough [1].
- 3
9. Starting rituximab or chemotherapy without testing for hepatitis B
Check HBsAg, anti-HBc and anti-HBs before treatment; hepatitis B reactivation can be fatal and is preventable with antiviral prophylaxis [9].
- 4
10. Starting a fluoropyrimidine without considering DPYD testing
DPD deficiency causes fatal toxicity; genotype-guided dosing reduces this risk [10]. (Pharmacogenomics lesson)
Supportive care
- 1
11. Primary G-CSF prophylaxis with low-risk regimens (below 20%) without risk factors
It has no benefit and adds cost and bone pain [1, 11]. (G-CSF tool)
- 2
12. Strong antiemetics (NK1) for low-emetogenic chemotherapy and multi-day dexamethasone without reason
Prevention should match the emetogenicity of the regimen; too much dexamethasone has side effects [2, 12]. (Antiemetic tool)
- 3
- 4
14. Treating asymptomatic CLL or smouldering myeloma just because of a laboratory number
In CLL, treatment starts only with the iwCLL criteria for active disease, not because of the lymphocyte count [16].
- 5
If you have been offered a treatment that is on this list, ask why; sometimes there is a good reason. A simple version: Targeted therapy or chemotherapy?
References
17 referencesShow all references, 9 with a study cardClose the reference list
Numbers in the text, such as [1], refer to these sources. Sources with a “Study card” button are summarised in the site’s evidence library.
- 1
- 2
- 3The ASH Choosing Wisely® campaign: five hematologic tests and treatments to question
- 4Ibrutinib-Rituximab or Chemoimmunotherapy for Chronic Lymphocytic Leukemia
- 5First-Line Venetoclax Combinations in Chronic Lymphocytic Leukemia
- 6Management of acute promyelocytic leukemia: updated recommendations from an expert panel of the European LeukemiaNet
- 7Retinoic acid and arsenic trioxide for acute promyelocytic leukemia
- 8Osimertinib in Untreated EGFR-Mutated Advanced Non-Small-Cell Lung Cancer
- 9Hepatitis B Virus Screening and Management for Patients With Cancer Prior to Therapy: ASCO Provisional Clinical Opinion Update
- 10Clinical Pharmacogenetics Implementation Consortium (CPIC) Guideline for Dihydropyrimidine Dehydrogenase Genotype and Fluoropyrimidine Dosing: 2017 Update
- 11Recommendations for the Use of WBC Growth Factors: American Society of Clinical Oncology Clinical Practice Guideline Update
- 12Antiemetics: ASCO Guideline Update
- 13Early palliative care for patients with metastatic non-small-cell lung cancer
- 14Integration of Palliative Care Into Standard Oncology Care: American Society of Clinical Oncology Clinical Practice Guideline Update
- 15Red Blood Cell Transfusion: 2023 AABB International Guidelines
- 16iwCLL guidelines for diagnosis, indications for treatment, response assessment, and supportive management of CLL
- 17Recommendations for the use of next-generation sequencing (NGS) for patients with advanced cancer in 2024: a report from the ESMO Precision Medicine Working Group
This page is based on reputable scientific sources and was last updated on 28 October 2026. The content of this website is for educational and informational purposes only and does not replace consultation, diagnosis or treatment by a specialist physician. Consult your treating physician about any treatment decision.
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