1.Challenges in Implementing Endoscopic Resection for T2Colorectal Cancer
Katsuro ICHIMASA ; Shin-ei KUDO ; Ker-Kan TAN ; Jonathan Wei Jie LEE ; Khay Guan YEOH
Gut and Liver 2024;18(2):218-221
The current standard treatment for muscularis propria-invasive (T2) colorectal cancer is surgical colectomy with lymph node dissection. With the advent of new endoscopic resection techniques, such as endoscopic full-thickness resection or endoscopic intermuscular dissection, T2 colorectal cancer, with metastasis to 20%-25% of the dissected lymph nodes, may be the next candidate for endoscopic resection following submucosal-invasive (T1) colorectal cancer. We present a novel endoscopic treatment strategy for T2 colorectal cancer and suggest further study to establish evidence on oncologic and endoscopic technical safety for its clinical implementation.
3.Does pulmonary metastasectomy of colorectal metastases translate to better survival? A systematic review.
Kai Yin LEE ; Jerrald LAU ; Bei En SIEW ; Yong Kang CHUA ; Yi Xuan LIM ; Xin Yi LIM ; Choon Seng CHONG ; Ker Kan TAN
Annals of the Academy of Medicine, Singapore 2021;50(10):773-781
INTRODUCTION:
Surgical resection of the primary and metastatic tumour is increasingly recommended in suitable patients with metastatic colorectal cancer (CRC). While the role of metastasectomy is well studied and established in colorectal liver metastasis, evidence remains limited in pulmonary metastases. This systematic review was conducted to examine the current evidence on the role of lung metastasectomy (LUM) in CRC.
METHODS:
Three databases were systematically searched, to identify studies that compared survival outcomes of LUM, and factors that affected decision for LUM.
RESULTS:
From a total of 5,477 records, 6 studies were eventually identified. Two papers reported findings from one randomised controlled trial and 4 were retrospective reviews. There was no clear survival benefit in patients who underwent LUM compared to those who did not. When compared against patients who underwent liver metastasectomy, there was also no clear survival benefit. Patients who underwent LUM were also more likely to have a single pulmonary tumour, and metachronous disease.
CONCLUSION
The evidence suggests a role for LUM, but is limited by inherent selection bias in retrospective reviews, and the single randomised clinical trial performed was not completed. More prospective studies are required to understand the true effect of LUM on outcomes in metastatic CRC.
Colorectal Neoplasms/surgery*
;
Humans
;
Liver Neoplasms/surgery*
;
Lung Neoplasms/surgery*
;
Metastasectomy
;
Pneumonectomy
;
Prognosis
;
Randomized Controlled Trials as Topic
;
Retrospective Studies
;
Survival Rate
4.Multimodal prehabilitation before major abdominal surgery: A retrospective study.
Ning Qi PANG ; Stephanie Shengjie HE ; Joel Qi Xuan FOO ; Natalie Hui Ying KOH ; Tin Wei YUEN ; Ming Na LIEW ; John Peter RAMYA ; Yijun LOY ; Glenn Kunnath BONNEY ; Wai Kit CHEONG ; Shridhar Ganpathi IYER ; Ker Kan TAN ; Wan Chin LIM ; Alfred Wei Chieh KOW
Annals of the Academy of Medicine, Singapore 2021;50(12):892-902
INTRODUCTION:
Prehabilitation may benefit older patients undergoing major surgeries. Currently, its efficacy has not been conclusively proven. This is a retrospective review of a multimodal prehabilitation programme.
METHODS:
Patients aged 65 years and above undergoing major abdominal surgery between May 2015 and December 2019 in the National University Hospital were included in our institutional programme that incorporated aspects of multimodal prehabilitation and Enhanced Recovery After Surgery concepts as 1 holistic perioperative pathway to deal with issues specific to older patients. Physical therapy, nutritional advice and psychosocial support were provided as part of prehabilitation.
RESULTS:
There were 335 patients in the prehabilitation cohort and 256 patients whose records were reviewed as control. No difference in postoperative length of stay (
CONCLUSION
The current study found no differences in traditional surgical outcome measures with and without prehabilitation. An increase in patient mobility in the immediate postoperative period was noted with prehabilitation, as well as an association between prehabilitation and increased adherence to postoperative adjuvant therapy. Larger prospective studies will be needed to validate the findings of this retrospective review.
Humans
;
Postoperative Complications/prevention & control*
;
Preoperative Care
;
Preoperative Exercise
;
Prospective Studies
;
Retrospective Studies
5.Nasal Cavity Metastasis From Colorectal Cancer Represents End-Stage Disease and Should Be Palliated
Stephen HWANG ; Dedrick Kok Hong CHAN ; Fredrik PETERSSON ; Ker-Kan TAN
Annals of Coloproctology 2020;36(2):119-121
Nasal metastases from colorectal cancer is rare. The presentation of nasal metastases is often very similar to primary nasal sinus adenocarcinoma. A high index of suspicion is required, especially in patients who have had a previous history of colorectal carcinoma. Histology is ultimately required for diagnosis. We describe 2 cases of nasal metastases from colorectal carcinoma, and discuss the presentation, diagnosis and management of the case. Such metastatic disease ultimately represents end-stage malignancy, and patients should be palliated.
6.Anal Adenocarcinoma Can Masquerade as Chronic Anal Fistula in Asians
Faith Qi Hui LEONG ; Dedrick Kok Hong CHAN ; Ker Kan TAN
Annals of Coloproctology 2019;35(1):47-49
PURPOSE: Perianal adenocarcinoma arising from a chronic anorectal fistula is a rare condition for which the natural history and optimal management are not well established. For that reason, we conducted a retrospective analysis of 5 consecutive patients with a perianal adenocarcinoma arising from a chronic anorectal fistula managed at our institution from January 2014 to December 2015. METHODS: The patients were identified from a prospectively collected colorectal cancer database that included all patients managed for colorectal cancer at our institution. RESULTS: The median age at diagnosis was 64 years (range, 55–72 years). Magnetic resonance imaging (MRI) was the initial investigation for all patients and showed a hyperintense T2-weighted image. One patient underwent an abdominoperineal resection following neoadjuvant chemoradiotherapy and remained disease free during the 12-month follow-up. Three patients received neoadjuvant therapy with intent for surgery, but did not undergo surgery due to either worsening health or metastatic spread. One patient declined intervention. The median overall survival was 10.5 months (range, 2–19 months). CONCLUSION: A high index of suspicion is required to make a clinical diagnosis of an anal adenocarcinoma arising from a chronic fistula. Histologic diagnosis must be achieved to confirm the diagnosis. Multimodal therapy with neoadjuvant chemoradiotherapy followed by abdominoperineal resection is the treatment of choice.
Adenocarcinoma
;
Asian Continental Ancestry Group
;
Chemoradiotherapy
;
Colorectal Neoplasms
;
Diagnosis
;
Fistula
;
Follow-Up Studies
;
Humans
;
Magnetic Resonance Imaging
;
Natural History
;
Neoadjuvant Therapy
;
Prospective Studies
;
Rectal Fistula
;
Retrospective Studies
7.Obstructive Ileocolitis in Patients With Obstructed Colorectal Cancer – A Matched Case Control Study.
Ning Qi PANG ; Tian Zhi LIM ; Yuanpei ZHOU ; Ker Kan TAN
Annals of Coloproctology 2018;34(4):175-179
PURPOSE: Obstructive ileocolitis is an ulcero-inflammatory condition which typically occurs in the ileum or colon proximal to an obstructing colorectal lesion. If left unresolved, it often leads to intestinal perforation. We present a matched case control study of patients with obstructive ileocolitis caused by colorectal cancer to determine if any factors can predict this condition. METHODS: This is a retrospective review of 21 patients with obstructive colorectal cancer and histologically proven obstructive ileocolitis from 2005 to 2015 matched for age and sex with 21 controls with obstructing colorectal cancer without obstructive ileocolitis. RESULTS: The 21 patients with obstructive ileocolitis had a median age of 71 years (range, 52–86 years). The most common presenting symptom was abdominal pain (n = 16, 76.2%), followed by vomiting/nausea (n = 14, 66.7%) and abdominal distension (n = 12, 57.1%). Interestingly, the radiological feature of pneumatosis intestinalis was noted in only 1 case. No significant differences were observed in baseline comorbidities, clinical presentations, or tumor characteristics between the 2 groups. Patients with obstructive ileocolitis were found to have a significantly higher total leucocyte count (17.1 ± 9.4×109/L vs. 12.0 ± 6.8×109/L, P = 0.016), lower pCO2 (32.3 ± 8.2 mmHg vs. 34.8 ± 4.9 mmHg, P = 0.013), lower HCO3 (18.8 ± 4.5 mmol/L vs. 23.6 ± 2.7 mmol/L, P < 0.001), lower base excess (-6.53 ± 5.32 mmol/L vs. -0.57 ± 2.99 mmol/L, P < 0.001) and higher serum lactate levels (3.14 ± 2.19 mmol/L vs. 1.19 ± 0.91 mmol/L, P = 0.007) compared to controls. No radiological features were predictive of obstructive ileocolitis. CONCLUSION: Patients with obstructive ileocolitis tend to present with metabolic acidosis with respiratory compensation, raised lactate, and worse leucocytosis. Radiological features are not useful for predicting this condition.
Abdominal Pain
;
Acidosis
;
Case-Control Studies*
;
Colon
;
Colorectal Neoplasms*
;
Comorbidity
;
Compensation and Redress
;
Crohn Disease*
;
Humans
;
Ileum
;
Intestinal Obstruction
;
Intestinal Perforation
;
Lactic Acid
;
Retrospective Studies
8.Assessment of age in ulcerative colitis patients with ileal pouch creation - an evaluation of outcomes.
Ker Kan TAN ; Ragavan MANOHARAN ; Saissan RAJENDRAN ; Praveen RAVINDRAN ; Christopher J YOUNG
Annals of the Academy of Medicine, Singapore 2015;44(3):92-97
INTRODUCTIONThe aim of the study was to determine if age at the creation of an ileal pouchanal anastomosis (IPAA) has an impact on the outcomes in patients with ulcerative colitis (UC).
MATERIALS AND METHODSA retrospective review of all patients who underwent IPAA for UC from 1999 to 2011 was performed. Long-term functional outcome was assessed using both the Cleveland Clinic and St Mark's incontinence scores.
RESULTSEighty-nine patients, with a median age of 46 (range, 16 to 71) years, formed the study group. The median duration of disease prior to their pouch surgery was 7 (0.5 to 39) years. There were 57 (64%) patients who were aged ≤50 years old and 32 (36%) who were >50 years old. Fifty-seven (64%) patients developed perioperative complications of which 51 (89.5%) were minor. High ileostomy output (n = 21, 23.6%) and urinary symptoms (n = 13, 14.6%) were the most commonly encountered complications. The older patients were more likely to have an ASA score ≥3 and a longer length of stay. Although there was a higher incidence of complications in the older group of patients, the difference was not statistically significant. There were no significant differences in the incidence of severe complications. Forty-nine (55%) patients completed our questionnaire on the evaluation of their functional outcomes. There were no significant differences in the Cleveland Clinic and St Mark's incontinence scores between the older (n = 19, 38.8%) and younger (n = 30, 61.2%) patients. There were also no significant differences in the frequency of bowel movements during the day or overnight after sleep between the 2 groups.
CONCLUSIONIPAA procedure for patients with UC can be safely performed. Long-term functional outcome is not significantly influenced by the age at which the IPAA was created.
Adolescent ; Adult ; Age Factors ; Aged ; Colitis, Ulcerative ; surgery ; Colonic Pouches ; Fecal Incontinence ; diagnosis ; epidemiology ; etiology ; Female ; Follow-Up Studies ; Humans ; Incidence ; Male ; Middle Aged ; Postoperative Complications ; diagnosis ; epidemiology ; Proctocolectomy, Restorative ; Retrospective Studies ; Treatment Outcome ; Young Adult
10.Preoperative Body Mass Index, 30-Day Postoperative Morbidity, Length of Stay and Quality of Life in Patients Undergoing Pelvic Exenteration Surgery for Recurrent and Locally-Advanced Rectal Cancer.
Jessica BEATON ; Sharon CAREY ; Michael J SOLOMON ; Ker Kan TAN ; Jane YOUNG
Annals of Coloproctology 2014;30(2):83-87
PURPOSE: Malnutrition is associated with an increased risk of developing complications following gastrointestinal surgery, especially following radical surgeries such as pelvic exenteration. This study aims to determine if preoperative body mass index (BMI) is associated with 30-day morbidity, length of hospital stay and/or quality of life (QoL) in patients undergoing pelvic exenteration surgery for recurrent and locally-advanced rectal cancer prior to a prospective trial. METHODS: A review of all patients who underwent pelvic exenteration surgery prior to 2008 was performed. Patients were included if they had a documented BMI as well as a QoL measurement (Functional Assessment Cancer Therapy - Colorectal questionnaire). RESULTS: Thirty-one patients, with a mean age of 56 years, had preoperative height and weight data, as well as measures of postoperative QoL, and formed the study group. The numbers of patients with recurrent (n = 17) or locally-advanced rectal cancer (n = 14) were similar. The mean length of stay was 21 days while the mean BMI of the patients was 24.3 (+/- 5.9) kg/m2. The majority of the patients were either of normal weight (n = 15) or overweight/obese (n = 11). The average length of hospital stay was significantly longer in patients who were underweight compared to those who were of normal weight (F = 6.508, P = 0.006) and those who were overweight and obese (F = 6.508, P = 0.007). CONCLUSION: This study suggests that a lower body mass index preoperatively is associated with a longer length of hospital stay. BMI is not associated with long-term QoL in this patient group. However, further prospective research is required.
Body Mass Index*
;
Humans
;
Length of Stay*
;
Malnutrition
;
Overweight
;
Pelvic Exenteration*
;
Quality of Life*
;
Rectal Neoplasms*
;
Thinness
;
Treatment Outcome

Result Analysis
Print
Save
E-mail