
- Vol 38, Issue 6
New Approaches and Considerations to Cancer and Suicide
Although estimates vary, patients with cancer are at least twice as likely to die by suicide than people who do not have cancer. By identifying those at greatest risk, these treatment modalities can help support patients.
Suicide and cancer are among the top 10 causes of death in the adult population of the United States. Although the overall prevalence of mortality due to cancer has been decreasing, it is still the second leading cause of US deaths,
Cancer and suicide have both plagued humanity since the beginning of recorded history. The first recorded mention of cancer appears in the Edwin Smith papyrus, dating from about 3000 BCE. Surviving documents from ancient Greek and Roman physicians detail attempts at diagnosing and curing the disease and give us the language we use today (oncology, from the Greek oncos, and cancer, from the Latin cancer, respectively). Suicide, too, has been a factor in death for millennia. The desire to control, to some extent, the timing and manner of one’s death has always been a human temptation, and this draw increases when physical or emotional distress are present.
Although estimates vary, patients with cancer (PWC) are at least twice as likely to die by suicide than people who do not have cancer. Moreover, having had psychiatric care prior to one’s diagnosis of cancer may not mitigate this increased risk.
Suicide Risk in Cancer
The most common cancers worldwide are lung, breast, colorectal, prostate, skin, and stomach; lung, colorectal, stomach, liver, and breast cancers account for
In addition to increased suicide risk, patients with head and neck cancers have higher depression scores than the general population, even before a cancer diagnosis. Therefore, the question arises of whether this subset of patients struggles with a biological cause in addition to diagnosis-related symptoms.10 Complicating these cases is the well-known association of many head and neck cancers with the use of tobacco, alcohol, and other substances, leading to the question of whether the preexisting mood disorders lead to substance use that increases the risk of cancer. However, the relative increase in number of cases of head and neck cancers linked to human papillomavirus instead of substance use may alter this picture.
In the case of
The suicide risk in patients with breast cancer has been relatively stable over the last 4 decades and may be linked to whether the patient has undergone surgery. Findings from Simpson and colleagues13 indicate that
In colorectal cancer, risk differs depending on the site of the lesion. Distally located disease is linked to a higher rate of suicide. This effect may be due to the more severe effects of distal disease on quality of life. Suicide risk in
Screening and Risk Assessment
Very little information has been collected regarding
The Columbia Suicide Severity Rating Scale is widely used for assessing suicidal intent, acts of furtherance, and suicide attempts. It is available at no cost and is designed to be used by anyone, including individuals without prior mental health care experience; there are versions specifically for individuals with cognitive impairments and for children. However, it does not provide guidance regarding full assessments or further steps if a screening is positive.
The Beck Hopelessness Scale asks true/false questions about future orientation, motivation, and expectations in order to assess negative feelings about the future. It can be used as an indirect evaluation of suicidal thoughts, but it does not address suicidal ideation directly. The detailed interpretation report can be very useful in assessing changes over time. Again, although the questions can be asked by anyone, the interpretation requires a trained professional.
The Hamilton Depression Scale (HAM-D) is a relatively brief questionnaire that asks about a variety of symptoms of depression. Suicide is mentioned in 1 of the 17 questions, which are on a graded scale. It does not ask about atypical symptoms and, while it has relatively high sensitivity, specificity is low.
The Patient Health Questionnaire-9 is a brief set of questions designed to be asked and reviewed by any health care professional, with recommendations of when to advise further assessment by a mental health professional. It has been shown to be reliable and valid in multiple studies. Like the HAM-D, it has relatively high sensitivity and low specificity.
Exploring Risk Factors
Multiple studies have shown cancer as an independent risk factor for completed and attempted suicide. Spoletini and colleagues17 contrasted suicide in the general population, which they attributed to “genetic and psychological vulnerability to stress,” to suicide in PWC, which involved the “
Depression is a major risk factor, as it is in the general population, but the population with cancer is at
An important component of identifying
Although few thorough examinations of the methods typically used for suicide have been conducted, the
Biological Risk Factors
A general understanding of suicidal ideation and behaviors involves alterations in the serotonin and hypothalamic-pituitary-adrenal axis (HPA) systems. Diseases like cancer that alter immune system function can also alter these axes, which may result in increased risk of suicide. Independently of co-occurring cancer, the immune system is altered in depression (eg, changes in cytokine and cell-mediated immunity; changes in HPA axis) and may contribute to the development of depression in a reciprocal manner.
Depression secondary to medical causes should be ruled out in PWC. This typically includes an evaluation of B12 and folate levels and checking for the presence of anemia, thyroid hormone imbalance, or adrenal hormone imbalance. The utility of assessing abnormalities in levels of electrolytes, including sodium, potassium, and magnesium, remains unclear, although there is considerable interest in the effect of imbalances on mental health.
To further complicate this picture, several medications used to treat cancer have been linked to depression, such as
Psychological Risk Factors
The escape model of suicidal drive may play a role, particularly in patients with a terminal diagnosis. This model postulates that the
There are confusing data regarding the complicated mix of desire to speed up death, depression, hopelessness, and suicide risk. It appears that patients with baseline depression are more likely to want hastened death, expressing this desire up to 4 times as often, but Porta-Sales and colleagues28 found that simply
Survivors of Childhood Cancers
Studies of suicidal ideation and completed suicide in adult PWC and survivors make up the bulk of the research in this area. As treatments and survival rates for childhood cancers improve, long-term studies of this population must include this information to more fully understand the lifelong effects of cancer treatment in children and adolescents, particularly since suicide is the top cause of death in the young adult populations of many developed countries. Gunnes and colleagues29 showed an increased risk of suicide in Norwegian patients aged 23 to 48 years who had a
Refusal of Treatment
Complicating the discussion of suicide in PWC is the subject of refusal of treatment—should this be considered suicide? Frenkel31 noted that “the unique
Treatment Options
Treatment for depression in PWC can be quite similar to the treatment of depression in the general population, with psychotherapy and pharmacotherapy (ie, selective serotonin reuptake inhibitors, selective serotonin-norepinephrine reuptake inhibitors, mirtazapine, trazodone) at its core. The most recent review of antidepressant therapy for depression in PWC did not show a significant improvement from placebo, but Ostuzzi and colleagues34 noted that there were
Psychotherapy, no matter how brief, can help patients adjust to their new health circumstances and to reassess their view of their life up until their diagnosis and their goals going forward. In addition, special considerations, such as the influence of altered immune activity and the effects of chemotherapy, must also weigh into treatment decisions. Moreover, prescribers must be judicious in choosing medications that can be expected to show some positive effect within the patient’s expected lifetime, which may be significantly shortened. Stimulants may be useful in treating the fatigue and inattention that are common during cancer treatment. Close collaboration with the oncologic team can help to optimize mental health during cancer treatment.
Conclusions
Patients with cancer are at increased risk for both suicidal ideation and completed suicide. Factors contributing to this increase are biological and psychological, and both components must be addressed in a timely fashion to increase quality of life. A refusal of treatment must not automatically be considered an instrument of suicide, but should be viewed as a complex decision, factoring in goals of care, particularly quality of life.
Dr Myers is a fourth-year resident and Dr Retamero is a faculty member of the Department of Psychiatry, Albert Einstein Medical Center, Philadelphia, PA. The authors have nothing to disclose regarding this article.
References
1.
2.
3. Zaorsky NG, Zhang Y, Tuanquin L, et al.
4. Urban D, Rao A, Bressel M, et al.
5. Al-Ghazal SK, Fallowfield L, Blamey RW.
6. Pham TT, Talukder AM, Walsh NJ, et al.
7. Dalela D, Krishna N, Okwara J et al.
8. Klaassen Z, Arora K, Wilson SN, et al.
9. Choi Y-N, Kim Y-A, Yun YH, et al.
10. Davies AD, Davies C, Delpo MC.
11. Kumar V, Chaudhary N, Soni P, Jha P.
12. Rahouma M, Kamel M, Abouarab A, et al.
13. Simpson WG, Klaassen Z, Jen RP, et al.
14. Janes T.
15. Anguiano L, Mayer DK, Piven ML, Rosenstein D.
16. Granek L, Nakash O, Ben-David M, et al.
17. Spoletini I, Gianni W, Caltagirone C, et al.
18. Li C, Li C, Forsythe L, et al.
19. Sherrill C, Smith M, Mascoe C, et al.
20. McFarland DC, Walsh L, Napolitano S, et al.
21. Abourmrad M, Shiner B, Riblet N, et al.
22.
23. Kenna HA, Poon AW, de los Angeles CP, Koran LM.
24. Celano CM, Freudenreich O, Fernandez-Robles C, et al.
25. Pinto EF, Andrade C.
26. Weddington WW Jr.
27. Baumeister RF.
28. Porta-Sales J, Crespo I, Monforte-Royo C, et al.
29. Gunnes MW, Lie RT, Bjørge T, et al.
30. Brinkman TM, Zhang N, Recklitis CJ, et al.
31. Frenkel M.
32. Engelhardt HT Jr.
33. Isenberg-Grzeda E, Bean S, Cohen C, Selby D.
34. Ostuzzi G, Matcham F, Daughy S, et al.
Articles in this issue
over 4 years ago
The Opioid Addiction Crisis and Racism: A Long, Troubled Historyover 4 years ago
Avoid These Common Retirement Mistakesover 4 years ago
Modern Medieval Artistover 4 years ago
Exploring the Evolution of Depressionover 4 years ago
War—What Is It Good For? Perhaps Modern Psychopharmacologyover 4 years ago
Can Epigenetics Promote Resilience Without Genetic Reductionism?Newsletter
Receive trusted psychiatric news, expert analysis, and clinical insights — subscribe today to support your practice and your patients.