Department of Critical Care Medicine, Instituto Nacional de Cancerología, Mexico
Department of Critical Care Medicine, Fundación Clínica Médica Sur, Mexico
Department of Critical Care Medicine, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico.
It was with great interest that I read the recent article by Biskup and colleagues  in Swiss Medical Weekly, which reported that type of tumour (solid versus haematological) is not a prognostic factor for mortality of cancer patients in the intensive care unit (ICU), and that there are no guidelines on how to select cancer patients to be admitted to the ICU . I would like to make the following comments in relation to the outcomes of critically ill cancer patients in the ICU.
Patients with haematological malignancies present critical care issues different from those with solid tumours. Haematological malignancies are diffuse at diagnosis, producing general body responses to widespread malignancy. The signs include capillary permeability syndrome, clotting issues, and catabolism that triggers complications such as respiratory distress, hypotension, disseminated intravascular coagulation, renal insufficiency and hepatic dysfunction . In terms of prognosis, cancer is not a homogeneous disease, and patients with solid tumours present with a lower mortality rate than patients with haematological malignancies [3–5]. Patients with haematological malignancies have a worse ICU survival than patients with solid tumours. In the ICU of the National Cancer Institute located in Mexico City, the patients with haematological malignancies had a higher ICU mortality rate than the subgroup of critically ill cancer patients with solid tumours (39.5 vs 11.9%) . Similarly, Oeyen et al.  reported that the hospital mortality rates of patients with haematological malignancies compared with solid tumours were as follows: hospital (34 v. 13%), 3 months (42 vs 17%), and 1 year (66 vs 36%). The outcome of patients admitted to the ICU with solid tumours is comparable to that of non-cancer patients (ICU mortality rate: 20 vs 18%, difference 2%; 95% confidence interval: −2.4 – 6.5%; p = 0.367) .
The decision to admit a patient with a haematological malignancy to the ICU is complex and challenging for physicians. Collaboration between groups of haematologists and specialists in critical care is essential for the evaluation of patients who potentially require treatment in the ICU.
- Recent diagnosis, complete remission, or stable disease;
- Treatment of any serious clinical condition related to cancer or its treatment (medical or surgical);
- High potential for control or cure of the haematological malignancy;
- Clinical condition that threatens life, with preferably less than three organ failures; and
- Performance status (Eastern Cooperative Oncology Group scale) between 0 and 2 [6, 9].
ICU admission should not be considered in the following scenarios:
- The patient or responsible family members do not accept admission into the ICU;
- Patients desiring palliative care as the only treatment option; and
- Poor quality of life before the acute event.
When there is no certainty of the potential benefit of admitting the patient to the ICU, admission is suggested to ensure that the patient has the chance to recover from an acute complication . In these cases, re-evaluation should be conducted between day 3 and day 5 of the ICU stay [9, 10]. It should be considered that patients who do not recover from organ failure during this period are less likely to survive; however, it is not recommended to limit intensive treatment before the fifth day of stay in the ICU .
In conclusion, survival rates for critically ill cancer patients who are admitted to the ICU have shown improvements, so admission should not be denied only because they have cancer. The decision-making process regarding admission of critically ill cancer patients to the ICU remains and requires collaborative and proactive multidisciplinary teamwork.
No financial support and no other potential conflict of interest relevant to this article was reported.
Silvio A. Ñamendys-Silva, MD, MSc, FCCP, Department of Critical Care Medicine, Instituto Nacional de Cancerología Mexico City, Mexico., Av. San Fernando no. 22,, Col. Sección XVI, Delegación Tlalpan, 14080 Mexico City, Mexico, snamendys[at]incan.edu.mx
1 Biskup E, Cai F, Vetter M, Marsch S. Oncological patients in the intensive care unit: prognosis, decision-making, therapies and end-of-life care. Swiss Med Wkly. 2017;147:w14481. https://smw.ch/en/article/doi/smw.2017.14481/ PubMed
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8 Taccone FS, Artigas AA, Sprung CL, Moreno R, Sakr Y, Vincent JL. Characteristics and outcomes of cancer patients in European ICUs. Crit Care. 2009;13(1):R15. doi:. http://dx.doi.org/10.1186/cc7713 PubMed
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