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Manic and hypomanic states in cancer patients: A systematic review

Published online by Cambridge University Press:  08 May 2026

Kyoko Osawa*
Affiliation:
Department of Psychiatry and Palliative Care Center, Shiga General Hospital, Moriyama, Japan Department of Anesthesiology, Wakayama Medical University, Wakayama, Japan Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
Daisuke Fujisawa
Affiliation:
Division of Quality Assurance Programs, National Cancer Center Institute for Cancer Control, Tokyo, Japan
*
Corresponding author: Kyoko Osawa; Email: osawa_kyoko@kuhp.kyoto-u.ac.jp
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Abstract

Objectives

While there have been reports on the relationship between cancer and depression, reports on the association between cancer and manic states, a reciprocal state of depression, have been relatively few. Therefore, we conducted a systematic review on the relationships between cancer and manic states, focusing on their etiology, clinical course, and impact on cancer treatments.

Methods

A systematic review was conducted using four electronic databases, following the PRISMA guidelines. The scope of the study included research on manic or hypomanic states associated with cancer in patients with no prior history of mental illness, published from 1950 to August, 2021. The study protocol was registered with PROSPERO (CRD42020182372).

Results

Fifty-six studies, including 67 cases, were identified. The etiology of manic states in cancer patients was classified into organic, drug-induced, and psychogenic, with steroids being the most predominant causative agent. Approximately half of the patients discontinued cancer treatment following the onset of manic states. This was associated with a low rate of pharmacological treatment during the acute and maintenance phase of mania. The onset of manic states was most frequent during cancer treatment; however, about 15% of the cases exhibit manic symptoms before cancer diagnosis.

Significance of results

This systematic review illustrated the clinical characteristics of manic state regarding differences in the etiology, timing of onset, pharmacological treatments, duration to remission, recurrence, and impact on cancer treatment. Manic states, which are comorbid with cancer, have significant clinical impacts on cancer prognosis. Therefore, appropriate pharmacological treatment for manic states is critical to consolidate appropriate cancer treatment. A substantial proportion of patients exhibit manic symptoms prior to the diagnosis of cancer, warranting further investigation into the possibility of the concept of “premonitory mania.”

Information

Type
Review Article
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2026. Published by Cambridge University Press.
Figure 0

Figure 1. Flow diagram of the systematic literature search.

Figure 1

Table 1. Summary of reports on cancer patients presenting with manic state

Figure 2

Table 2. Manic states in 67 cancer patients

Figure 3

Table 3. Details of organic cases

Figure 4

Table 4. Medications used to treat manic states

Figure 5

Table 5. Comparison of cases who did and did not receive cancer treatment after a manic state

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