Abstract
Patients with peritoneal or local metastases from colorectal cancer have a poor prognosis. However, aggressive treatments by debulking surgery and infusional intraperitoneal (i.p.) chemotherapy have been tried and appear to benefit selected patients. We assayed the effects of debulking surgery and i.p. chemotherapy with respect to survival and compared the results with matched control patients treated by intravenous (i.v.) chemotherapy. In all, 18 patients with peritoneal and/or local metastases from colorectal adenocarcinoma underwent debulking surgery followed by 5-fluorouracil (5-FU) 550 mg m−2 day−1 i.p. and leucovorin (LV) 60 mg m−2 day−1 i.v. The chemotherapy was started the day after surgery and was given daily for 6 days and repeated monthly for totally eight courses. The control patients, matched for age, gender, performance status and metastatic site, were randomly selected from controlled clinical chemotherapy trials and treated with i.v. 5-FU+LV or i.v. methotrexate+5-FU+LV. There was no treatment-related mortality. The median survival among i.p. patients was 32 months compared to 14 months in the control group. In all, 11 patients who underwent macroscopically radical surgery had a longer survival than those who were not radically operated (P=0.02). These results indicate that patients with peritoneal metastases and/or locally advanced cancers but without distant metastases may benefit from cytoreductive surgery combined with i.p. chemotherapy.
Main
Peritoneal or local metastasis from colorectal cancer implies a poor prognosis (Graf et al, 1991; Mahteme et al, 1996; Shepherd et al, 1997; Assersohn et al, 1999) and the treatment remains a challenging problem. Moreover, patients with peritoneal carcinomatosis often suffer from intestinal obstruction and nutritional deficit (van Ooijen et al, 1993; Mahteme et al, 1996). In the absence of more effective therapeutic options, systemic 5-fluorouracil (5-FU)-based chemotherapy, irinotecan or oxaliplatin is used in order to achieve a regression of the tumour and improved outcome (Ragnhammar et al, 2001; Glimelius, 2003). Previous studies have demonstrated that chemotherapy prolongs survival about 4–6 months compared with supportive care alone (Colorectal Cancer Collaborative Group, 2000). The median survival time in patients with peritoneal carcinosis treated with modern chemotherapy is in the order of 6–12 months (de Gramont et al, 2000). Intraperitoneal (i.p.) 5-FU infusion has been suggested as an alternative route of administration with the purpose to expose peritoneal and local tumour remnants to high cytotoxic drug levels (Cunliffe and Sugarbaker, 1989), while only small amounts pass into systemic circulation. In recent years, there have been reports on i.p. chemotherapy treatment after cytoreductive surgery (Schellinx et al, 1996; Horsell et al, 1999; Culliford et al, 2001). A median survival of about 30 months was recently reported in patients treated with cytoreductive surgery plus i.p. chemotherapy (Elias et al, 2001).
The aim of this study was to explore the effects of cytoreductive surgery followed by repeated courses of i.p. chemotherapy with respect to feasibility, side effects and survival, and to compare with the results obtained using systemic chemotherapy.
Patients and methods
Patients characteristics
In all, 18 patients (nine women, nine men, mean age 54 years, range 31–74) were included in the study. The study was approved by the regional ethics committees. The protocol was set up in 1991 and the last patient was included in September 1999. The inclusion criteria were primary colorectal adenocarcinoma (colon 16, rectal 2), with local or peritoneal tumour deposits either resectable or suitable for debulking surgery, and without hepatic or other extra abdominal tumour growth as judged from laparotomy, chest X-ray and ultrasonography/CT scan, age <75 years and American Society of Anesthesiologists (ASA) classification grades 1–2. Informed consent was obtained from each patient. The diagnosis of the primary tumour and the metastases were verified histopathologically. One patient was not treated according to the protocol because of extensive irresectable peritoneal tumour growth. The remaining 17 patients were treated by either total macroscopic removal (11) or debulking (6) of the metastases followed by i.p. chemotherapy. In four patients, the diagnosis of local or peritoneal spread was carried out concomitant with the diagnosis of the primary tumour, and in the remaining 14 patients there was an interval of mean 19 (range 1–52) months between the diagnosis of the primary tumour and the local/peritoneal recurrence. A system for classification of local/peritoneal spread was set up based on which all patients could be classified: (a) predominant peritoneal growth±smaller local deposits; (b) predominant local growth±smaller peritoneal deposits; and (c) predominant abdominal wall growth±smaller local or peritoneal deposits. Two patients were classified in group a, six in group b and 10 in group c.
Surgical treatment
The mean operating time was 3.7 h (range 0.9–6.7). The surgical procedure, the metastatic location and the treatments are detailed in Table 1. At the end of surgery, a PORT-A-CATH (No. 21-2000-04, SIMS deltec, Inc., St Paul, MN, USA) was placed subcutaneously just above the periost of the lower ribs and a catheter was tunnelled through the abdominal wall and directed towards the principal tumour site. Finally, a drainage no. 18 was placed in the abdominal cavity. The drainage was plugged while the chemotherapy was given, but opened for drainage of peritoneal fluid for 1–2 h just before the next i.p. infusion. This drainage was removed at the end of the first treatment course.
Intraperitoneal chemotherapy
The i.p. chemotherapy was started the day after surgery. 5-Fluorouracil was given i.p. (550 mg m−2 day−1) dissolved in 500 ml saline 0.9%. At 60 min after the start of the i.p. infusion, an i.v. infusion of leucovorin (LV) (60 mg m−2) was administered. The pharmacokinetical rationale for this sequential treatment is to obtain simultaneous tissue peak concentration of 5-FU and LV (Spears et al, 1989). The 5-FU dose was selected after a pilot study, showing that an i.p. 5-FU dose of 550 mg m−2 day−1 during 6 days was possible to give directly after major abdominal surgery without causing an increased risk for postoperative complications (Graf et al, 1994c). The chemotherapy treatment was given daily for 6 days with 4–6 weeks intervals. Any possible symptoms and side effects of the treatment were registered. Before the second course of treatment, a single photon emission computed tomography (SPECT) (General Electric, GE Maxxus, Milwaukee, WI) (Technetium-labelled albumin (99Tcm Albures) at volume of 500 ml) was performed to judge the potential distribution of the drug in the abdominal cavity. The distribution of the drug was calculated using a computer-based measurement (FBP, Nuclear Diagnostics AB, Stockholm, Sweden). After the fourth course, a clinical evaluation was carried out. Another run of four courses was given if the patients responded well, tolerated treatment and had no clinical signs of tumour progression. After the eighth course, the patients were evaluated by clinical examination and CT scans/MRI or a second look. In two patients, the choice of the i.p. chemotherapy courses after the first one was based on in vitro assessment of chemotherapy-resistance test (Csoka et al, 1995). In these patients, i.p. cisplatin and i.p. irinotecan was given, respectively. The i.p. treatment was given as an outpatient procedure, except the first course, which was given directly after surgery.
Control group
In all, 18 patients (nine women, nine men, mean age 56 years, range 36–69) treated for advanced colorectal adenocarcinoma within the Nordic chemotherapy trials (Nordic Gastrointestinal Tumour Adjuvant Therapy Group, 1992; Glimelius, 1993; Glimelius et al, 1998) were randomly selected as a reference group. The selection was made without any knowledge of survival. The selection criteria were: (1) resected primary colorectal adenocarcinoma (colon 15, rectal 3); (2) local or peritoneal tumour deposits; (3) no lymphatic, hepatic or extra abdominal tumour growth; (4) Karnofsky performance status >80 (mean 90, range 80–100); (5) treated by intravenous (i.v.) chemotherapy (eight patients received MFL and 10 received FLv). Furthermore, the control group was matched according to age and gender. The metastatic sites in this group were as follows: peritoneal (5), local (9) and peritoneal and local (4).
Statistical methods
Survival curves were constructed according to the Kaplan–Mayer method and differences were analysed with the log-rank test. Differences in proportions were evaluated with Fisher exact test. A P-value below 0.05 was considered statistically significant.
Results
Treatment effect
The median number of i.p. chemotherapy courses was 3 (1–8). Four patients had pain during or immediately after the i.p. infusion; however, none of the patients terminated the planned treatment because of infusion-related pain. Leakage from the drain site was noted in one patient. Two patients suffered repetitively from nausea and vomiting during the i.p. treatment period, and transient neutropenia was noted in one patient. Of the patients, 13 terminated the planned treatment prematurely, seven of them because of catheter-related problems (local catheter infection (1), improper position (1), obstruction (5)), ileus 1, liver metastases 1, decline in general status 1 and two patients refused further treatment. Single photon emission computed tomography studies showed a median abdominal cavity distribution volume of 2896 ml (range 32–11 557). In one patient, treatment was withdrawn after SPECT because of the lack of widespread distribution in abdominal cavity. In five patients the PORT-A-CATH was reoperated. There was no mortality related to surgery or to the i.p. treatment. In one patient who was not treated with cytoreductive surgery, no i.p. chemotherapy was administered.
Survival
The median survival in i.p. patients was 32 months (95% confidence interval (CI) 22.2–62.6 months), whereas in the i.v. control group it was 14 months (95% CI 5.6–24.9 months), (P=0.01, Figure 1). A 2 and 5 years survival in i.p. patients were 60 and 28%, whereas corresponding values in the i.v. control group were 10 and 5%. In all, 11 patients who were considered macroscopically tumour free after the tumour reduction procedure had a longer survival (34.5 months, 95% CI 28.7–75.7) than those who did not undergo macroscopically radical surgery (10 months, 95% CI −15.7 to 70.0), (P=0.02, Figure 2). Five patients in whom radical surgery could be performed are still alive (median 8.3 years, range 6.8–9.1) after surgery. One patient who underwent radical surgery survived only 4 months. One patient who was considered not to be macroscopicallly tumor free after the tumor reduction procedure is still alive and has survived 10.8 years. In total, 10 patients in whom radical surgery was not performed survived median 13 months (range 3 months–10.8 years).
Discussion
Our experience, with treatment of peritoneal colorectal metastases, is promising. We believe patients without hematogenous metastases (e.g. liver, lung, etc) from colorectal cancer might have a survival benefit if cytoreductive surgery is combined with i.p. chemotherapy. Furthermore, a complete remission of the disease is possible for an extended period of time. It seems that a macroscopically radical tumour resection has an impact on survival.
This series is not a prospective-randomised study, and a selection of patients may of course have influenced the results. However, in an attempt to compare the locoregional treatment to standard i.v. chemotherapy, we used historical controls. The two combinations (MFL and FLv) of chemotherapy, both based on biochemical modulation of 5-FU, were equally effective with respect to survival and response rates in one trial (Glimelius et al, 1998). It is therefore reasonable to consider these two combinations as equal and these patients thus received ‘golden standard’ chemotherapy during their treatment period. However, the more recently developed combination regimen (de Gramont et al, 2000; Douillard et al, 2000; Saltz et al, 2000) are even more effective than those used in the Nordic chemotherapy trials.
The relative importance of the i.p. chemotherapy cannot be properly assessed in the present study and further studies are needed to clarify a possible contribution of locoregional chemotherapy to the treatment effect. A possible benefit of a repeated regional treatment has been suggested since the end of 1960s (Long et al, 1969) and several reports have been published since then (Sugarbaker et al, 1996; Stephens et al, 1999; Cavaliere et al, 2000; Elias et al, 2001). One of the major problems is the nonuniform distribution of the chemotherapy to tumour deposits within the abdominal cavity. The SPECTs can be valuable to analyse the drug distribution in the abdominal cavity. If there are several adhesions, the labelled albumin will accumulate only in a limited space and chemotherapy may not reach all possible metastatic sites. To prevent postoperative adhesions and an obliterated abdomen, an early start of i.p. infusion, that is, immediately after surgery or at the latest the first postoperative day may be important.
One of the concerns of i.p. chemotherapy is anastomotic dehiscence. A study in humans indicated that it is possible to give the present regimen a day after surgery without suppressing the collagen accumulation too much (Graf et al, 1994a, 1994b). In addition, an experimental study showed an impaired healing after i.p. 5-FU, but when folinic acid was added, no further deterioration occurred (Graf et al, 1992). However, this problem and other chemotherapy-related toxicities have been investigated in several clinical studies and this form of administration has not been associated with an increased complication rate (Graf et al, 1994c; Vaillant et al, 2000).
The antitumoral effect of chemotherapy is believed to be enhanced by hyperthermia (41–42°C), possibly through an increase in cell membrane permeability, alteration of active drug transport, a change in cell metabolism and a decreased interstitial fluid pressure (Hahn and Shiu, 1983; Leunig et al, 1992; Kong et al, 2000). Moreover, recent clinical studies have shown promising results (Beaujard et al, 2000; Cavaliere et al, 2000). However, there is a lack of consensus about the optimal target temperature and a finding of increased morbidity and mortality when a cytoreduction procedure has been followed by hyperthermic i.p. chemotherapy (Jacquet et al, 1996) that warrant further studies. To optimise the i.p. treatment, choosing the appropriate chemotherapy is crucial. An important obstacle to successful treatment of solid tumours is the resistance to cytotoxic drugs (Wright et al, 1998; Germann, 2000; Keppler et al, 2000). In this context, the drug resistance examination is a potential valuable tool (Csoka et al, 1994, 1995).
In summary, a survival benefit can be achieved with cytoreductive surgery followed by repeated courses of i.p. chemotherapy. A complete remission of the disease is possible for an extended period of time. However, a longer period of follow-up is needed to establish if definite cure is possible for this category of patients and a randomised study is necessary to prove the value of this approach definitely.
Change history
16 November 2011
This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication
References
Assersohn L, Norman A, Cunningham D, Benepal T, Ross PJ, Oates J . Influence of metastatic site as an additional predictor for response and outcome in advanced colorectal carcinoma. Br J Cancer 1999; 79: 1800–1805
Beaujard A, Glehen O, Caillot J, Francois Y, Bienvenu J, Panteix G, Garbit F, Grandclement E, Vignal J, Gilly FN . Intraperitoneal chemohyperthermia with mitomycin C for digestive tract cancer patients with peritoneal carcinomatosis. Cancer 2000; 88: 2512–2519
Cavaliere F, Di Flippo F, Botti C, Cosimelli M, Giannarelli D, Aloe L, Arcuri E, Aromatario C, Consolo S, Callopoli A, Laurenzi L, Tedesco M, Di Angelo P, Giunta S, Cavaliere R . Peritonectomy and hyperthermic antiblastic perfusion in the treatment of peritoneal carcinomatosis. Eur J Surg Oncol 2000; 26: 486–491
Colorectal Cancer Collaborative Group. Palliative chemotherapy for advanced colorectal cancer: systematic review and meta-analysis. BMJ 2000; 321: 531–551
Csoka K, Larsson R, Tholander B, Gerdin E, dela Torre M, Nygren P . Cytotoxic drug sensitivity testing of tumour cells from patients with ovarian carcinoma using the fluorometric microculture cytotoxicity assay (FMCA). Gynecol Oncol 1994; 54: 163–170
Csoka K, Nygren P, Graf W, Påhlman L, Glimelius B, Larsson R . Selective sensitivity of solid tumors to suramin in primary c of tumor cells from patients. Int J Cancer 1995; 3: 356–360
Culliford 4th AT, Books AD, Sharma S, Saltz LB, Schwartz GK, O'Reilly EM, Ilson DH, Kemeny NE, Kelsen DP, Guillem JG, Wong WD, Cohen AM, Paty PB . Surgical debulking and intraperitoneal chemotherapy for established peritoneal metastases from colon and appendix cancer. Ann Surg Oncol 2001; 10: 787–795
Cunliffe WJ, Sugarbaker PH . Gastrointestinal malignancy: rationale for adjuvant therapy using early postoperative intraperitoneal chemotherapy. Br J Surg 1989; 76: 1082–1090
de Gramont A, Figer A, Seymour M, Homerin M, Hmissi A, Cassidy J, Boni C, Cortes-Funes H, Cervantes A, Freyer G, Papamichael D, Le Bail N, Louvet C, Hendler D, de Braud F, Wilson C, Morvan F, Bonetti A . Leucovorin and fluorouracil with or without oxaliplatin as first-line treatment in advanced colorectal cancer. J Clin Oncol 2000; 18: 2938–2947
Douillard JY, Cunningham D, Roth AD, Navarro M, James RD, Karasek P, Jandik P, Iveson T, Carmichael J, Alaki M, Gruia G, Awad L, Rougier P . Irinotecan combined with fluorouracil compared with fluorouracil alone as first-line treatment for metastatic colorectal cancer: a multicentre randomised trail. Lancet 2000; 355: 1041–1047
Elias D, Blot F, El Otmany A, Antoun S, Lasser P, Boige V, Rougier P, Ducreux M . Curative treatment of peritoneal carcinomatosis arising from colorectal cancer by complete resection and intraperitoneal chemotherapy. Cancer 2001; 92: 71–76
Germann UA . Detection of recombinant P-glycoprotein in multidrug resistant cultured cells. Mol Biotechnol 2000; 14: 131–145
Glimelius B . Biochemical modulation of 5-fluorouracil: a randomized comparison of sequential methotrexate, 5-fluorouracil and leucovorin versus sequential 5-fluorouracil and leucovorin in patients with advanced symptomatic colorectal cancer. The gastrointestinal tumour adjuvant therapy group. Ann Oncol 1993; 4: 235–240
Glimelius B, Jakobsen A, Graf W, Berglund Å, Gadeberg C, Hansen P, Kjaer M, Brunsgaard N, Sandberg E, Lindberg B, Sellstrom H, Lorentz T, Påhlman L, Gustavsson B . Bolus injection (2–4 min) versus short-term (10–20 min) infusion of 5-fluorouracil in patients with advanced colorectal cancer: a prospective randomised trial. Eur J Cancer 1998; 34: 674–678
Glimelius B . Palliative treatment of patients with colorectal cancer. Scand J Surg 2003; 1: 74–83
Graf W, Glimelius B, Påhlman L, Bergström R . Determinant of prognosis in advanced colorectal cancer. Eur J Cancer 1991; 27: 1119–1123
Graf W, Weiber S, Glimelius B, Jiborn H, Påhlman L, Zederfeldt B . Influence of 5-fluorouracil and folinic acid on colonic healing: an experimental study in the rat. Br J Surg 1992; 79: 825–828
Graf W, Ivarsson M, Gerdin B, Hellsing K, Påhlman L, Glimelius B . The influence of early postoperative intraperitoneal chemotherapy on human wound healing. J Surg Res 1994a; 57: 394–400
Graf W, Weiber S, Jiborn H, påhlman L, Glimelius B, Zederfeldt B . The roles of nutritional depletion and drug concentration in 5-fluorouracil induced inhibition of colonic healing. J Surg Res 1994b; 5: 452–456
Graf W, Westlin J-E, Påhlman L, Glimelius B . Adjuvant intraperitoneal 5-fluorouracil and intravenous leucovorin after colorectal cancer surgery: a randomized phase II placebo-controlled study. Int J Colorectal Dis 1994c; 1: 35–39
Hahn GM, Shiu EC . Effect of pH and elevated temperatures on the cytotoxicity of some chemotherapeurtic agents on Chinese hamster cells in vitro. Cancer Res 1983; 43: 5789–5791
Horsell KW, Merten S, Clingan P, King DW, Morrsis DL . Peritonectomy and intraperitoneal chemotherapy in appendix and colorectal cancer. Aust NZ J Surg 1999; 69: 729–732
Jacquet P, Stephens AD, Averbach AM, Chang D, Ettinghausen SE, Dalton RR, Steves MA, Sugarbaker PH . Analysis of morbidity and mortality in 60 patients with peritoneal carcinomatosis treated by cytoreductive surgery and heated intraoperative intraperitoneal chemotherapy. Cancer 1996; 77: 2622–2629
Keppler D, Kamisako T, Leier I, Yunhai C, Nies A, Tsujii H, Konig J . Localization, substrate specificity, and drug resistance conferred by conjugate export pumps of the MRP family. Adv Enzyme Regul 2000; 40: 339–349
Kong G, Braun R, Dewhirst M . Hyperthermia enables tumor-specific nanoparticle delivery: effect of particle size. Cancer Res 2000; 60: 4440–4445
Leunig M, Goetz AE, Dellian M, Zetterer G, Gamarra F, Jain RK, Messmer K . Interstitial fluid pressure in solid tumors following hyperthermia: possible correlation with therapeutic response. Cancer Res 1992; 52: 487–490
Long RTL, Spratt Jr JS, Dowling E . Pseudomyxoma peritonei. New concepts in management with a report of seventeen patients. Am J Surg 1969; 117: 162–169
Mahteme H, Påhlman L, Glimelius B, Graf W . Prognosis after surgery in patients with incurable rectal cancer: a population-based study. Br J Surg 1996; 83: 1116–1120
Nordic Gastrointestinal Tumour Adjuvant Therapy gRoup. Expectancy or primary chemotherapy in patients with advanced asymptomatic colorectal cancer: a randomized trial. J Clin Oncol 1992; 10: 904–911
Ragnhammar P, Hafström L, Nygren P, Glimelius B . A systematic overview of chemotherapy effects in colorectal cancer. Acta Oncol 2001; 40: 282–308
Saltz LB, Cox JV, Blanke C, Rosen LS, Fehrenbacher L, Moore MJ, Maroun JA, Ackland SP, Locker PK, Pirotta N, Elfring GL, Miller LL . Irinotecan plus fluorouracil and leucovorin for metastatic colorectal cancer. N Engl J Med 2000; 343: 905–914
Schellinx ME, von Meyenfeldt MF, Sugerbaker PH . Peritoneal carcinomatosis from adenocarcinoma of the colon. Cancer Treat Res 1996; 81: 247–260
Shepherd N, Baxter K, Love S . The prognostic importance of peritoneal involvement in colonic cancer: a prospective evaluation. Gastroenterology 1997; 112: 1096–1102
Spears CP, Gustavsson BG, Frösing R . Folinic acid modulation of fluorouracil: tissue kinetics of bolus administration. Invest New Drugs 1989; 7: 27–36
Stephens AD, Alderman R, Chang D, Edwards GD, Esquivel J, Steves M, Sugarbaker PH . Morbidity and mortality analysis of 200 treatments with cytoreductive surgery and hyperthermic intraoperative intraperitoneal chemotherapy using the coliseum technique. Ann Surg Oncol 1999; 6: 790–796
Sugarbaker PH, Schellinx ME, Chang D, Koslowe P, von Meyerfeldt M . Peritoneal carcinomatosis from adenocarcinoma of the colon. World J Surg 1996; 20: 585–592
Vaillant J-C, Nordlinger B, Deuffic S, Arnaud JP, Pelissier E, Favre JP, Jaeck D, Fourtanier G, Grandjean JP, Marre P, Letoublon C . Adjuvant intraperitoneal 5-fluorouracil in high risk colon cancer. Ann Surg 2000; 231: 449–456
van Ooijen B, van der Burg M, Planting A, Siersema P, Wiggers T . Surgical treatment of gastric drainage only for intestinal obstruction in patients with carcinoma of the ovary or peritoneal carcinomatosis of other origin. Surg Gynecol Obstet 1993; 176: 469–474
Wright SR, Boag AH, Valdimarsson G, Hipfner DR, Campling BG, Cole SP, Deeley RG . Immunohistochemical detection of multidrug resistance protein in human lung cancer and normal lung. Clin Cancer Res 1998; 4: 2279–2289
Acknowledgements
This study was supported by the Swedish Cancer Society Project No. 4618-B01-01XAA
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
From twelve months after its original publication, this work is licensed under the Creative Commons Attribution-NonCommercial-Share Alike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
About this article
Cite this article
Mahteme, H., Hansson, J., Berglund, Å. et al. Improved survival in patients with peritoneal metastases from colorectal cancer: a preliminary study. Br J Cancer 90, 403–407 (2004). https://doi.org/10.1038/sj.bjc.6601586
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1038/sj.bjc.6601586
Keywords
This article is cited by
-
Impact of KRAS, BRAF and microsatellite instability status after cytoreductive surgery and HIPEC in a national cohort of colorectal peritoneal metastasis patients
British Journal of Cancer (2022)
-
Cancer follow-up supported by patient-reported outcomes in patients undergoing intended curative complex surgery for advanced cancer
Journal of Patient-Reported Outcomes (2021)
-
Survival outcomes in patients aged 75 years and over with peritoneal colorectal carcinomatosis after cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (HIPEC): multicenter study of the Spanish Group of Peritoneal Cancer Surgery (GECOP)
Clinical and Translational Oncology (2020)
-
Systemic chemotherapy plus cetuximab after complete surgery in the treatment of isolated colorectal peritoneal carcinoma: COCHISE phase II clinical trial
BMC Research Notes (2019)
-
Neoadjuvant chemotherapy followed by cytoreductive surgery and hyperthermic intraperitoneal chemotherapy for colorectal cancer: a feasibility and safety study
World Journal of Surgical Oncology (2019)