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Post-chemotherapy cognitive impairment (PCCI) (also known as chemotherapy-induced cognitive dysfunction or impairment, chemo brain, or chemo fog) describes the cognitive impairment that can result from chemotherapy treatment. Approximately 20–30% of people who undergo chemotherapy experience some level of post-chemotherapy cognitive impairment. The phenomenon first came to light because of the large number of breast cancer survivors who complained of changes in memory, fluency, and other cognitive abilities that impeded their ability to function as they had pre-chemotherapy. Although the causes and existence of post-chemotherapy cognitive impairment have been a subject of debate, recent studies have confirmed that post-chemotherapy cognitive impairment is a real, measurable side effect of chemotherapy that appears in some patients. While any cancer patient may experience temporary cognitive impairment while undergoing chemotherapy, patients with PCCI continue to experience these symptoms long after chemotherapy has been completed. PCCI is often seen in patients treated for breast cancer, ovarian cancer, prostate cancer, and other reproductive cancers,〔 as well as other types of cancers requiring aggressive treatment with chemotherapy. The clinical relevance of PCCI is significant, considering the increasing number of long-term cancer survivors in the population, many of whom may have been treated with aggressive dosing of chemotherapeutic agents, or with chemotherapy as an adjuvant to other forms of treatment. In some patients, fear of PCCI can impact treatment decisions. The magnitude of chemotherapy-related cognitive changes and their impact on the activities of daily living are uncertain.〔 ==Incidence== PCCI affects a subset of cancer survivors,〔 though the overall epidemiology and prevalence is not well known and may depend on many factors. It generally affects about 10–40% of breast cancer patients, with higher rates among pre-menopausal women and patients who receive high-dose chemotherapy. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Post-chemotherapy cognitive impairment」の詳細全文を読む スポンサード リンク
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