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Expanding laparoscopic pancreaticoduodenectomy to pancreatic-head and periampullary malignancy: major findings based on systematic review and meta-analysis



Laparoscopic pancreaticoduodenectomy (LPD) remains to be established as a safe and effective alternative to open pancreaticoduodenectomy (OPD) for pancreatic-head and periampullary malignancy. The purpose of this meta-analysis was to compare LPD with OPD for these malignancies regarding short-term surgical and long-term survival outcomes.


A literature search was conducted before March 2018 to identify comparative studies in regard to outcomes of both LPD and OPD for the treatment of pancreatic-head and periampullary malignancies. Morbidity, postoperative pancreatic fistula (POPF), mortality, operative time, estimated blood loss, hospitalization, retrieved lymph nodes, and survival outcomes were compared.


Among eleven identified studies, 1196 underwent LPD, and 8247 were operated through OPD. The pooled data showed that LPD was associated with less morbidity (OR = 0.57, 95%CI: 0.41~ 0.78, P < 0.01), less blood loss (WMD = − 372.96 ml, 95% CI, − 507.83~ − 238.09 ml, P < 0.01), shorter hospital stays (WMD = − 197.49 ml, 95% CI, − 304.62~ − 90.37 ml, P < 0.01), and comparable POPF (OR = 0.85, 95%CI: 0.59~ 1.24, P = 0.40), and overall survival (HR = 1.03, 95%CI: 0.93~ 1.14, P = 0.54) compared to OPD. Operative time was longer in LPD (WMD = 87.68 min; 95%CI: 27.05~ 148.32, P < 0.01), whereas R0 rate tended to be higher in LPD (OR = 1.17; 95%CI: 1.00~ 1.37, P = 0.05) and there tended to be more retrieved lymph nodes in LPD (WMD = 1.15, 95%CI: -0.16~ 2.47, P = 0.08), but these differences failed to reach statistical significance.


LPD can be performed as safe and effective as OPD for pancreatic-head and periampullary malignancy with respect to both surgical and oncological outcomes. LPD is associated with less intraoperative blood loss and postoperative morbidity and may serve as a promising alternative to OPD in selected individuals in the future.

Peer Review reports


Pancreatic-head and periampullary malignancy mainly include pancreatic duct adenocarcinoma (PDAC) and periampullary adenocarcinoma (PAAC). PDAC causes a considerable amount of cancer-related death worldwide. In fact, PDAC is the fourth deadliest malignancy in developed countries and is predicted to become the second one within several years [1, 2]. PAAC, defined as malignancy located in the distal common bile duct, ampulla of Vater or adjacent duodenum, are uncommon cancers compared to PDAC. However, despite its relatively higher resectability rates compared with PDAC, the long-term survival outcomes of PAAC patients are poor [3]. These cancers represent great challenges for healthcare providers and require a multidisciplinary approach in which pancreaticoduodenectomy (PD) with lymphadenectomy remains the primary curative treatment for patients without distant metastasis.

Minimally invasive surgery, typically characterized by laparoscopic approach, is one of the main surgical advances in the twenty-first Century [4]. It has been applied to complex pancreatic procedures including laparoscopic PD (LPD) for neoplasms on the pancreatic head and periampullar region or laparoscopic distal pancreatectomy (LDP) for these on the pancreatic body or tail. LDP represents a technique, which is technically less demanding, without any reconstruction, whereas LPD is a demanding procedure, which should be performed only in referral centers by experienced surgeons. Now, several meta-analyses have been published regarding LDP for malignancy treatment [5, 6], there was still no meta-analysis on the potential advantages and disadvantages of LPD for cancers. This meta-analysis proposed to dig deeper into the surgical and oncologic outcomes of patients who suffered from pancreatic-head and periampullary malignancy and underwent LPD versus open PD (OPD).


Study selection

We systematically searched the relevant literature using PubMed, Embase, Cochrane Library, and EBSCO for articles published up to March 2018 The search terms “minimally invasive”, “laparoscopy”, “Whipple”, “pancreaticoduodenectomy”, “pancreatic ductal adenocarcinoma”, “pancreatic cancer”, “ampullary cancer”, “ampulla of Vater”, and “periampullary neoplasm” were utilized. All eligible studies were retrieved, and their bibliographies were further checked for other potential publications. The language of the publications was confined to English.

Inclusion criteria

Publications included in this study were based on the following criteria: (1) compared LPD and OPD in patients suffering from pancreatic-head and periampullary malignancy (PDAC and PAAC); (2) reported on at least one of the outcome measures mentioned below; and (3) if there was overlap between authors and/or institutions, the higher quality or more recent publication was selected.

Data extraction

Information was independently extracted from eligible studies by two authors (Chen K and Liu XL). The following information was collected: Primary outcomes: morbidity, mortality, postoperative pancreatic fistula (POPF), margin status, retrieved lymph nodes (RLNs), and long-term survival. Secondary outcomes: operative time, intraoperative blood loss, transfusion, and length of hospital stay. The postoperative morbidity was classified according to the Clavien-Dindo classification when possible [7]. POPF were diagnosed in accordance with the International Study Group for Pancreatic Fistula (ISGPF) criteria [8]. Clinically significant POPF was defined as ISGPF grade B/C. Resection margins were considered negative (R0) when no tumor was evident along the transection surface [9].

Quality assessment

The Newcastle-Ottawa Quality Assessment Scale (NOS) was used to evaluate the quality of non-randomized controlled trials (NRCTs). The quality of each study was scored by taking into account patient selection, comparability of the groups and assessment of the outcomes. The scale ranges from 0 to 9 stars: studies with a score ≥ 6 could be deemed as methodologically sound. Randomized controlled trials (RCTs) were assessed by the Jadad scale. High quality RCTs get more than 2 out of a maximum possible score of 5.

Statistical analysis

Statistical analysis was performed using the RevMan 5.1 software (Cochrane Collaboration, Oxford, UK). The odds ratio (OR) or weighted mean differences (WMD) with 95% confidence intervals (CI) were calculated for dichotomous and continuous results, respectively. Medians were converted to means by the method introduced by Hozo et al. [10]. The hazard ratio (HR) was used as a summary statistic for long-term survival. The log HR and its standard error (SE) were analyzed directly if the studies reported the HR and 95% CI. Otherwise, the log HR and its SE were estimated using the method described by Tierney et al. [11]. The fixed-effect model was firstly used for primary and secondary outcomes, and in case of significant heterogeneity (I2>50% or Q test P < 0.05) the results were calculated using the random-effect model. Subgroup analysis was carried out according to the tumor primaries (PDAC or PAAC). Funnel plots were used to screen for publication bias based on the R0 rate. The statistical tests were two-sided, and P < 0.05 was considered statistically significant.


Study characteristics and quality of included studies

The search strategy initially generated 668 relevant clinical trials. Of these, articles that did not compare LPD with OPD were excluded based on their titles and abstracts. Thus, 86 articles were selected and a full examination of the text was conducted. A further 73 papers were excluded because the surgical indications of these studies were not restricted to pancreatic-head and periampullary malignancy. Another two publications were then excluded due to overlapping patient cohorts [12, 13]. Finally, a total of 9443 patients [LPD 1196 (12.7%), OPD 8247 (87.3%)] from 11 studies were included [14,15,16,17,18,19,20,21,22,23,24]. Figure 1 illustrates the selection process. Only one RCR was found [22]. The indication of six studies was PDAC [14, 16,17,18,19,20], whereas two studies applied LPD only to PAAC [15, 24], the remaining three researches reported both PDAC and PAAC [21,22,23]. Table 1 lists the characteristics of these studies and details of the enrolled participants. The RCT conducted by Palanivelu et al. received a Jadad score of 3 [22]. The quality evaluation using NOS showed that the included NRCTs were methodologically sound with four studies receiving 9 stars, five studies receiving 8 stars, and the remaining study receiving 7 stars (Table 1).

Fig. 1
figure 1

Flow chart of literature search strategies

Table 1 Summary of studies included in the meta-analysis

Primary outcomes

POPF was described in 8 studies [14, 15, 18, 19, 21,22,23,24]. Pooling data indicated no significant difference in terms of overall POPF rates between two groups (OR = 0.85, 95%CI: 0.59~ 1.24, P = 0.40) (Fig. 2), as well as the clinically significant POPF rates (OR = 0.86, 95%CI: 0.53~ 1.41, P = 0.56). The morbidity was available from 7 studies [14, 15, 18, 19, 21,22,23]. The pooled data indicated that the overall postoperative morbidity was significantly decreased in LPD (OR = 0.57, 95%CI: 0.41~ 0.78, P < 0.01) (Fig. 3). Eight studies recorded postoperative mortality [14, 15, 19,20,21,22,23,24]. Mortality was similar in LPD and OPD for malignancies (OR = 0.88, 95%CI: 0.64~ 1.20, P = 0.41) (Fig. 4). Negative margin (R0) rate was reported in all studies. The difference in R0 rate was not significant in pooling results, but had a tendency to be higher in the LPD group than in the OPD group (OR = 1.17, 95%CI: 1.00~ 1.37, P = 0.05) (Fig. 5). The funnel plot for studies reporting the ORs of R0 was used to detect publication bias. Visual inspection of the funnel plot revealed symmetry, indicating no serious publication bias, as illustrated in Fig. 6. The RLNs were pooled from 10 studies [14,15,16,17, 19,20,21,22,23,24]. Pooled results revealed a tendency of more RLNs in the LPD group than in the OPD group with a marginal difference (WMD = 1.15, 95%CI: -0.16~ 2.47, P = 0.08) (Fig. 7). Six studies reported survival outcomes. The overall survival rate was not found to be different among the two groups (HR = 1.03, 95%CI: 0.93~ 1.14, P = 0.54) (Fig. 8). The primary outcomes of the quantitative meta-analysis were summarized in Table 2.

Fig. 2
figure 2

Forest plot of the meta-analysis: overall POPF

Fig. 3
figure 3

Forest plot of the meta-analysis: morbidity

Fig. 4
figure 4

Forest plot of the meta-analysis: mortality

Fig. 5
figure 5

Forest plot of the meta-analysis: R0 rate

Fig. 6
figure 6

Funnel plots of the R0 rate

Fig. 7
figure 7

Forest plot of the meta-analysis: retrieved lymph nodes

Fig. 8
figure 8

Forest plot of the meta-analysis: overall survival rate

Table 2 Results of the meta-analysis

Secondary outcomes

Five studies reported operative time [14, 19, 22,23,24]. The operative time in LPD group was longer than that in OPD group (WMD = 87.68 min, 95%CI: 27.05~ 148.32, P < 0.01). Also five studies reported blood loss [14, 19, 22,23,24]. The estimated blood loss was significantly reduced in LPD group (WMD = − 197.49 ml, 95% CI, − 304.62~ − 90.37 ml, P < 0.01). A similar result was achieved in the field of blood transfusions (OR = 0.64, 95 %CI: 0.50~ 0.84, P < 0.01). Nine studies reported the length of hospital stay [14, 15, 18,19,20,21,22,23,24]. The pooled data indicated a comparable length of hospital stay between groups (WMD = − 1.07, 95%CI, − 3.05~ − 0.92, P = 0.29). Tumor size was available except in one study [20]. The tumor size of OPD was larger than that of LPD (WMD = − 0.16, 95%CI, − 0.31~ − 0.02, P = 0.03). The secondary outcomes of the quantitative meta-analysis are outlined in Table 2.

Sensitivity analysis

One retrospectively muti-institutional study conducted by Kantor et al. [20], in which only PDAC were included, provided the vast majority of cases. The study offered outcomes of mortality, R0 rate, RLNs, overall survival, and length of hospital stay. We investigated the influence of this study on the overall estimated risk by sequentially removing it from the pooled outcomes. We found only the pooling data of R0 rate changed from marginal difference (OR = 1.17, 95%CI: 1.00~ 1.37, P = 0.05) to no significant difference (OR = 1.28, 95%CI: 0.89~ 1.84, P = 0.19), whereas the main results presented no obvious changes.


Minimally invasive PD (MIPD), a laparoscopic surgery, was first described by Gagner and Pompin in 1994, and there has been a recent surge of interest for this demanding technique [25, 26]. PD is a complex procedure and the advantages of minimally invasive approaches used to be closely scrutinized. Although several meta-analyses have confirmed the advantages of MIPD over open surgery, there has been no analysis restricted to malignancy. Moreover, effects of oncologic results were not well evaluated due to insufficient data. In Table 3, we present several previous meta-analyses comparing MIPD to OPD for benign and malignant periampullary disease [27,28,29,30,31,32,33,34].

Table 3 Previous meta-analyses comparing MIPD with OPD for benign and malignant periampullary disease

This meta-analysis selected and summarized the available literature that compared the short-term surgical and long-term survival results of LPD and OPD for malignant periampullary disease. To the best of our knowledge, this is the first meta-analysis comparing LPD versus OPD for the treatment of pancreatic-head and periampullary cancer. No statistically significant differences were identified between the two groups regarding POPF, mortality, overall survival rate, and hospital stay. Operative time was significantly longer in the LPD group. The differences of R0 rate, and RLNs did not reach statistical significance, but tended to be superior in the LPD group. Moreover, LPD exhibited statistically significant benefits in terms of blood loss, and overall postoperative complications.

The progress of LPD was slow due to the threatening complication of POPF. High rates ranging from 4 to 33% for conventional open surgery were previously reported for both benign and malignant lesions [35, 36]. POPF rates range from 11.8 to 55.2% in LPD for malignancy as reported seemed to somewhat higher than the results above (Table 4). It was also reported that LPD for resection of periampullary tumors was associated with higher morbidity, mainly due to severe POPF [18]. However, our pooling data demonstrated comparable rates, regardless of overall POPFs or clinically significant POPFs between LPD and OPD for malignancy. The approaches which could reduce POPFs also can be completed under laparoscope [37]. The end-to-side, duct-to-mucosa pancreaticojejunostomy (PJ) was now the most commonly performed pancreatic anastomosis approach under laparoscopy just as the conventional open approach [38]. Importantly, our results have shown improved overall morbidity of LPD. Since surgical complications, mainly POPFs, were comparable between the two groups because of the same organ and lymphatic resection area of LPD and OPD, the reduced overall complications may be the result of fewer medical complications. PD involves multiple systems and the complexity of performing three anastomoses can result in enormous surgical trauma, which would result in high risks of medical complications. Pulmonary, cardiovascular, and cerebrovascular morbidities were the most frequent systemic complications in major abdominal surgery. Less bleeding and use of transfusion contribute to preserve stable pulmonary and cardiovascular functions [39]. In addition, less pain and earlier ambulation allows patients to restore physiological homeostasis.

Table 4 Studies on LPD for pancreatic cancer

The pooling results show that LPD is linked with a tendency of lower positive margin rate (P = 0.05) and more retrieved lymph nodes (P = 0.08), two of the oncologic outcomes. Appropriate lymphadenectomy is crucial because elimination of a sufficient quantity of lymphadens could help to strengthen the staging accuracy and regional tumor control. In addition, curative R0 resection is referred as the most important factor determining, which is deemed the only chance to survival [40], and the prognostic validity of margin status may be primarily confined to pancreatic head cancers rather than neoplasms in body or tail [41]. Elaborate manipulation and better visualization of critical anatomy could explain our outcomes. However, as our results also indicated a shorter tumor size in LPD group, some researches may include LPD cases of small, easily resectable tumors that would be partial to LPD, the benefit of LPD for margin status and lymph nodes harvesting cannot be confirmed, but at least not inferior to open surgery. Long-term survival rate is crucial the outcome for evaluating surgical interventions in oncological therapy. Periampullary cancer, especially PDAC, has significantly more aggressive inherent tumor biology, for which there are hardly any effect of adjuvant therapy [42, 43]. Large series on PDAC reported 5-year survival rates only around 20% [44, 45], and estimated at only 20–50% for PAAC [3, 46]. None of the previous studies on LPD identify survival advantages of the laparoscopic approach, and our analysis revealed the HR of overall survival rate was comparable between LPD and OPD. We agree with the viewpoint of Croome et al. that neither the laparoscopic or open procedure was technically superior would largely depend on the technique of surgeon and on pathologic analytic variability. Thus, a technically similar oncologic resection could be performed regardless of whether the open or laparoscopic approach was meticulously used [14].

Regarding the operative time and blood loss, our pooled data indicated similar outcomes to the previous studies (Table 3). Because of the intricate dissection and complicated gastrointestinal, LPD present a more demanding and challenging approach for pancreatic surgeons. Kendrick and Cusati report their initial duration of LPD to be approximately 8 h, which improved to 5 h after approximately 50 cases [47]. Therefore, adequate training and optimizing surgical potency to reduce the operative time is required before LPD becomes a generally accepted and sustainable procedure. Another benefit of laparoscopic surgery lies in the enhanced postoperative recovery. Reduced use of analgesic drugs, shortened time of abdominal cavity exposure, and earlier postoperative activities are considered to be the main reasons.

This systematic review and meta-analysis of LDP versus ODP for pancreatic-head and periampullary malignancy represents the most comprehensive collection of evidence available within this field. However, the results should still be explained with caution for several limitations. First, only one study was RCT, while others were NRCTs. Selection biases necessarily consist in surgeons’ or patients’ decision on operation and adjuvant therapy. Moreover, various biases are real concerns because hardly any of the included studies employed standardized appraisal for the end points. Second, clinical heterogeneity needs significant attention. The surgical techniques, take the different the extension of lymph node dissection for example, and histopathological protocols were variable in both open and laparoscopic groups. Third, there are biological differences between PDAC and PAAC. Although a subgroup analysis was conducted, we should still admit various histologies unpowered our outcomes because several studies did not differentiate PDAC and PAAC in their studies, and even in PAAC, there are several different histologies. Last but not least, it should be kept in mind that these studies were on behalf of the best centers’ experience on LPD around the world. The literature showed that specialization in pancreatic surgery results in both better short- and long-term survival [48]. Obtained conclusions might not be feasible in less specialized centers.


Our meta-analysis demonstrated that in contrasted to OPD, LPD could achieve short-term advantages within blood loss, and postoperative morbidity for pancreatic-head and periampullary malignancy. Moreover, both procedures have comparable oncological and long-term survival outcomes. LPD may serve as a promising alternative to OPD in selected individuals suffered pancreatic-head and periampullary malignancy. However, taking into account all the limitations of the study, methodologically high-quality controlled clinical trials are necessary for further evaluation. Anyway, we believe our study could serve as a useful background for future researches.



Confidence intervals


Hazard ratio


International Study Group for Pancreatic Fistula


Laparoscopic distal pancreatectomy


Laparoscopic pancreaticoduodenectomy


Minimally invasive pancreaticoduodenectomy


Newcastle-Ottawa Quality Assessment Scale


Nonrandomized comparative study


Open pancreaticoduodenectomy


Odds ratio


Periampullary adenocarcinoma




Pancreatic duct adenocarcinoma


Randomized controlled trial


Retrieved lymph nodes


Robotic pancreaticoduodenectomy


Standard deviation


Standard error


Weighted mean difference


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Availability of data and materials

The datasets analyzed during the current study available from the corresponding author on reasonable request.

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KC and YP designed the study; XLL collected relevant literature and conducted the analysis of pooled data; KC and HM wrote the manuscript; XFW proofread and revised the manuscript. All authors have approved the version to be published.

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Correspondence to Xian-fa Wang.

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Chen, K., Liu, Xl., Pan, Y. et al. Expanding laparoscopic pancreaticoduodenectomy to pancreatic-head and periampullary malignancy: major findings based on systematic review and meta-analysis. BMC Gastroenterol 18, 102 (2018).

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  • Laparoscopy
  • Pancreaticoduodenectomy
  • Adenocarcinoma
  • Morbidity
  • Meta-analysis