H. Denys MD, PhD

Molecular test algorithms for breast tumours

SUMMARY

In order to advise the Federal Government on all matters related to personalised medicine in oncology, including the reimbursement of molecular tests, the Commission of Personalized Medicine (ComPerMed) has applied, for the breast tumours, the same methodology as previously applied for the digestive tumours. Meaning, the different molecular tests, represented in the shape of algorithms, are annotated with test levels — which aim to reflect their relevance based on current available data and to define the reimbursement — and are documented with recent literature, guidelines and a brief technical description.

(BELG J MED ONCOL 2019;13(2):40–45)

Four case reports of arterial thromboembolism and cisplatin administration

Cisplatin is one of the frequently used chemotherapeutic agents. Common side effects such as vomiting, nephrotoxicity, ototoxicity and neurotoxicity are well known, though Cisplatin is also thought to activate destructive processes in blood vessels, including all types of arteries. Not only can it cause long-term cardiovascular complications (myocardial infarction, hypertension, and stroke), but also such complications during or shortly after its systemic administration. In a significant portion of patients, with up to 9% in some studies, thromboembolic events are encountered.^1,2 In most of the cases, this concerns a venous thromboembolic event, though arterial thromboembolic events should not be neglected as it predicts a bad prognosis and significantly increased mortality risk, especially in cancer patients receiving other prothrombotic chemotherapies or when certain comorbidities are present that enhance the risk of thromboembolism.³ During a short period, we encountered four patients with arterial thromboembolic events while receiving Cisplatin-based therapy, of which three patients had a renal infarction. It should be noted that each patient had a different type of malignancy and Cisplatin was administered in combination with other therapeutic agents.

(BELG J MED ONCOL 2018:12(3):125–129)

Extracellular vesicles to diagnose and treat cancer

SUMMARY

Extracellular vesicles transfer lipids, nucleic acids and membrane-associated as well as intraluminal proteins between cells to maintain homeostasis and regulate physiological functions. This communication system is hijacked in cancer. Tumour-derived extracellular vesicles enter the circulation and carry targeting motifs and unique messages for cell-type specific instruction of distant ecosystems to foster metastasis. In this review we focus on how extracellular vesicles provide new opportunities for the diagnosis and treatment of cancer. Quantification and characterisation of tumour-derived extracellular vesicles obtained by liquid biopsy may enable the diagnosis and prognosis of cancer patients. Interference with extracellular vesicle biogenesis and implementation of extracellular vesicles as cancer vaccines or drug delivery vehicles opens up therapeutic potential to treat cancer.

(BELG J MED ONCOL 2017;11(3):92–105)

P.11 Outcome and relapse pattern between squamous cell and adenocarcinoma of the cervix

Adjuvant endocrine therapy in pre- and perimenopausal women with breast cancer: practice guidelines

Summary

Oestrogen receptor positive early invasive breast cancer is a common disease in pre- and perimenopausal women. Adjuvant endocrine therapy is an essential part of its treatment. Until recently, premenopausal patients were uniformly treated with tamoxifen during five years. Given the recent publication of large clinical trials showing a benefit for other treatment regimens, the BSMO Breast Cancer Task Force met on the 6th of March, 2015, to propose common guidelines for adjuvant endocrine therapy for premenopausal patients. The members agreed that low-risk patients should be treated with five to ten years of tamoxifen, while the highest-risk patients should be treated with exemestane or tamoxifen plus ovarian function suppression. Special attention should be given to patients less than 35 years at diagnosis: in this subgroup, exemestane plus ovarian function suppression is preferred to tamoxifen plus ovarian function suppression.

(BELG J MED ONCOL 2016;10(3):92–96)

Therapy-orienting testing of BRCA1 and BRCA2 germline mutations in women with ovarian cancer

With the aim to optimally position poly-(adenosine diphosphate-ribose) polymerase inhibitors in the treatment of ovarian cancer, a panel of Belgian Experts came to a national multidisciplinary consensus: (i) germline BRCA1/2 testing should be indicated for all women with high-grade serous epithelial ovarian cancer, who are in good general condition (i.e. eligible for systemic treatment with low toxicity); BRCA1/2 mutation detection ratios being about 15–20% in this group; (ii) as the finding of a BRCA1/2 germline mutation has therapeutic implications in ovarian cancer patients, the request for therapy-orienting testing should be made as soon as possible during the course of first-line treatment. Pre-test genetic counselling is important because positive testing has implications for both the patients and their relatives, and the nature of the discussions depends on whether they take place in a therapeutic or familial context. The organisation of consultations should be coordinated in a collaborative effort between clinical geneticists, and gynaecological and medical oncologists, keeping in mind that ‘fast-track’ pre-test genetic counselling and short turnaround times are required for patients for whom the test results will have a therapeutic impact. Offering germline BRCA1/2 testing to all patients with high-grade serous epithelial ovarian cancer who are eligible for systemic treatment with low toxicity will lead to a limited increase in the number of patients eligible for this test in Belgium.

(BELG J MED ONCOL 2015;9(2):65–70)

Adjuvant and neoadjuvant chemotherapy regimens in breast cancer: summary from the BSMO breast cancer task force meeting

Knowledge on adjuvant and neoadjuvant chemotherapy regimens in breast cancer is increasing rapidly. Many different regimens are available: some have been compared with each other, but still many questions remain to be answered. At the breast cancer task force meeting of the Belgian Society of Medical Oncology (BSMO) in Brussels, on February 21^st 2014, 41 medical oncologists involved in breast cancer management reviewed the most important recent data. The task force discussed a framework for regimen selection in clinical practice. The authors of this paper summarised the literature and meeting discussion, highlighting controversial areas.

(BELG J MED ONCOL 2014;8(4):116–24)