A Systematic Review of Population-Based Studies of Chronic Bowel Symptoms in Cancer Survivors following Pelvic Radiotherapy

Pelvic radiotherapy can damage surrounding tissue and organs, causing chronic conditions including bowel symptoms. We systematically identified quantitative, population-based studies of patient-reported bowel symptoms following pelvic radiotherapy to synthesize evidence of symptom type, prevalence, and severity. Medline, CINAHL, EMBASE, and PsychINFO were searched from inception to September 2022. Following independent screening of titles, abstracts, and full-texts, population and study characteristics and symptom findings were extracted, and narrative synthesis was conducted. In total, 45 papers (prostate, n = 39; gynecological, n = 6) reporting 19 datasets were included. Studies were methodologically heterogeneous. Most frequently assessed was bowel function ('score', 26 papers, 'bother', 19 papers). Also assessed was urgency, diarrhea, bleeding, incontinence, abdominal pain, painful hemorrhoids, rectal wetness, constipation, mucous discharge, frequency, and gas. Prevalence ranged from 1% (bleeding) to 59% (anal bleeding for >12 months at any time since start of treatment). In total, 10 papers compared radiotherapy with non-cancer comparators and 24 with non-radiotherapy cancer patient groups. Symptom prevalence/severity was greater/worse in radiotherapy groups and symptoms more common/worse post-radiotherapy than pre-diagnosis/treatment. Symptom prevalence varied between studies and symptoms. This review confirms that many people experience chronic bowel symptoms following pelvic radiotherapy. Greater methodological consistency, and investigation of less-well-studied survivor populations, could better inform the provision of services and support.

Chronic diarrhoea in an oncology patient - Clinical assessment and decision making

Cancer survival is improving rapidly due to advances in treatments that will often involve radiotherapy, chemotherapy and novel biological agents in addition to surgery. This comes at the price of living with chronic symptoms, of which diarrhoea is particularly common. There is good evidence that for many patients these symptoms become part of everyday life, their "normality" is adjusted and symptoms are tolerated even when limiting activities severely. Clinicians often fail to appreciate the impact of these problems, as the focus of follow up tends to be on cancer recurrence. However, the rapid identification of patients in significant trouble can lead to earlier diagnosis of treatable pathologies and improvement of patients' symptoms. The aim of this review is to highlight the mechanisms which cause oncology patients to develop diarrhoea and highlight useful investigational and treatment strategies.

Gastrointestinal consequences of cancer treatment: evaluation of 10 years' experience at a tertiary UK centre

OBJECTIVE

Up to 90% of patients treated for pelvic cancers experience chronic gastrointestinal (GI) symptoms. This study characterises this patient cohort at a single centre, addressing a paucity of publications reporting 'real-world' experiences.

METHOD

Outpatient referrals, from oncology to the gastroenterology and nutrition services, at a tertiary London hospital from 2006 to 2016, were retrospectively identified. Patient characteristics, reported symptoms, investigations, diagnoses, response to therapeutics and follow-up were recorded.

RESULTS

Of 269 patients referred, 81% were within the latter 5 years. A total of 260 patients had diagnoses of pelvic cancers (prostatic (52%), cervical (19%) and endometrial (19%)). Among 247 treated with radiotherapy, the median time from radiotherapy to symptom onset was 8 months. Common symptoms were rectal bleeding (51%), diarrhoea (32%), faecal urgency (19%) and pain (19%). Patients underwent a median of three investigations including lower GI endoscopy (86%), thyroid function tests (33%) and glucose hydrogen breath test (30%). Diagnoses included radiation proctopathy (39%), colonic polyps (16%), pelvic floor dysfunction (12%), bile acid malabsorption (BAM) (8%), small intestinal bacterial overgrowth (SIBO) (8%), vitamin D deficiency (7%) and iron deficiency (7%). Among 164 discharged patients, the time to discharge was 7 months, after a median of two appointments.

CONCLUSIONS

This unique patient group reports a complex mix of symptoms and requires specialist review and consideration of often uninvestigated diagnoses (pelvic dysfunction, BAM, SIBO and nutritional deficiencies). Such patients are often overlooked, compared with those suffering many other chronic GI disorders. Further reports from non-dedicated centres treating patients with pelvic radiation disease will aid in understanding of secondary GI diagnoses and variation in practice.

Impact of the antifermentative diet during radiotherapy for prostate cancer in elderly, SÃO Paulo, Brazil

OBJECTIVE

Assess the impact of the antifermentative diet on the dietary intake and body composition of elderly prostate cancer patients in radiotherapy.

METHODS

Observational and prospective study involving 45 men aged 60 years or older, receiving radiotherapy for prostate cancer treatment. The dietary intake was assessed at four times during radiotherapy: onset (T_Pre), between the 11th and 16th day (T₁), between the 24th and 28th day (T₂), and on the last day (T_Last). The body composition was assessed before and on the last day of radiotherapy, by means of the body weight and height, mid-arm circumference, triceps and subscapular skin folds, phase angle, resistance, and reactance. The data were statistically treated, considering a 5% significance level.

RESULTS

The intake of energy, dietary fibers, and some nutrients decreased during the radiotherapy (p < 0.05). The intake of vitamins E, B1, B2, and folate, of the minerals calcium, magnesium, potassium, sodium, and phosphorus, and of the amino acid leucine dropped when the four assessment times were compared (p < 0.05). As regards the body composition, an impact was observed at the end of the radiotherapy, with lower body weight, arm circumference, subscapular cutaneous fold, phase angle and reactance (p < 0.05).

CONCLUSION

The antifermentative diet negatively influenced the food consumption and body composition of elderly patients submitted to radiotherapy for prostate cancer.

Supporting self-management of radiation-induced bowel and bladder dysfunction in pelvic-cancer rehabilitation: An ethnographic study

AIMS AND OBJECTIVES

To describe and understand strategies that oncological nurses use to support self-management of radiation-induced bowel and bladder issues in pelvic-cancer rehabilitation patients.

BACKGROUND

Nurse-led self-management of radiation-induced bowel and bladder issues holds the potential to support cancer survivors.

DESIGN

An ethnographic approach was applied in this study, which adhered to Consolidated Criteria for Reporting Qualitative Research (COREQ) guidelines.

METHODS

Data collection was conducted in Sweden between October 2015-April 2018, involving observations of nurses' daily work, formal and informal interviews, individual and group interviews, and reviews of relevant documents used in the studied practice. Furthermore, 15 supportive nurse-patient talks were observed, and an ethnographic analysis was performed.

RESULTS

The analysis identified the following three categories of nursing strategies that support self-management of radiation-induced bowel and bladder issues in pelvic-cancer rehabilitation patients: encouraging self-reflection, tailoring solutions together and keeping patients motivated. Nurses and patients jointly make sense of patients' symptoms using data that patients collect about themselves. Based on their shared understanding, they can co-create solutions to meet each individual patient's needs and develop routines to keep the patient motivated in performing the devised solutions.

CONCLUSIONS

The results indicate that the strategies nurses use to support patients in self-management of radiation-induced bowel and bladder issues entail intertwining patients' experiences with their nurses' medical knowledge and specific clinical practice. Nurses' strategies build on their ability to connect patients' experiences and the elements of their own work practice.

RELEVANCE TO CLINICAL PRACTICE

A deeper understanding of nurses' strategies to support self-management of radiation-induced bowel and bladder issues in pelvic-cancer rehabilitation patients can improve other self-management programmes, inform nurses' education and aid in the design of tools for pelvic-cancer rehabilitation support.