The role of surgery for gastric linitis plastica (GLP) is questioned. This study aimed to analyze our experience in the surgical treatment of GLP with specific reference to the resectability rate, prognosis, and mode of recurrence.
Results of surgery were analyzed in 102 patients with GLP.
Of the 102 patients, 92 underwent surgical exploration, with resection performed in 60 cases. R2 resection was carried out in 20 patients and R1 in 12 patients, while the resection was considered potentially curative (R0) in 28 (27.5%). Overall, the median (95% confidence interval [CI]) survival time was 5.7 (3.7–7.5) months, with none of the patients alive at the end date of the study. For R0 patients the median (95% CI) survival time was 15.8 (11–20.7) months. The great majority of recurrences were intra-abdominal (peritoneal and/or locoregional), with a systemic component of the relapse that was rarely observed (5 cases).
After primary surgery, GLP showed a poor prognosis without regard to the extent or type of resection. The failure of surgical treatment related mainly to the peritoneal spread of the disease. Specifically designed multimodality treatment protocols should be tested in this setting.
Gastric cancer (GC) is one of the leading causes of cancer-related death worldwide. The incidence of intestinal-type GC is decreasing in Western countries, although the number of diffuse-type cancers remains stable . No specific epidemiological data are available for gastric linitis plastica (GLP), although this type of tumor is stably observed in clinical practice, accounting for 3–19% of GC cases .
Although the prognosis of GLP is commonly considered poor, the number of reports addressing this topic is quite small.
The purpose of this study was to analyze our experience in the surgical treatment of GLP with specific reference to the resectability rate, overall survival, and mode of recurrence.
GLP was defined as a GC of the diffuse histotype according to Lauren  that by diffuse infiltration caused thickening and stiffening of the gastric wall and involved circumferentially at least one-third of the stomach. GLP frequently involved the stomach from the fundus to the pylorus.
Population under study
This study analyzed 102 patients who were evaluated from January 1990 to December 2007 in four Italian surgical departments (Department of General Surgery and Surgical Oncology, University of Siena; First Department of General Surgery, University of Verona; Department of Digestive Surgery, Catholic University of Rome; Division of General Surgery, Valdarno, Arezzo) that are part of the Italian Research Group for Gastric Cancer (IRGGC).
The study was approved by the local ethics committees.
Clinical staging included esophagogastroduodenoscopy (EGD) with biopsy barium swallow, and thoracoabdominal computed tomography (CT) in every case. Endoscopic ultrasonography (EUS) and other investigations were performed according to physician’s judgments. Staging laparoscopy was never employed during the time of the study.
Extent of gastric resection and lymphadenectomy
The main goal of surgery was to achieve the complete removal of the tumor (R0 resection), although palliative procedures were carried out in order to treat tumor-related complications.
Total gastrectomy was usually preferred, although distal subtotal gastrectomy was performed in selected cases; namely, in tumors located in the lower third of the stomach provided that the proximal resection margin stayed at least 6 cm from the tumor edge (9 cases).
In potentially curative gastrectomy, an extended lymph node dissection is routinely carried out at the four institutions; likewise, at the four institutions, D2–3 lymphadenectomy was employed in fit patients. Lymphadenectomy was classified and standardized in accordance with the Japanese Gastric Cancer Association (JGCA) guidelines . The median (range) number of excised nodes was 36 (15–88). Lymphadenectomy at the splenic hilum was performed in patients with tumors reaching the greater curvature and the gastric fundus or with enlarged nodes at the splenic hilum. This was achieved by performing a pancreas-preserving splenectomy (11 cases).
No patient in the cohort was proposed to undergo preoperative chemotherapy and/or radiotherapy.
Staging and lymph node classification
Tumors were staged according to the pathological classification (pTNM) of the American Joint Committee on Cancer (AJCC) . Lymph node involvement was classified according to the number (AJCC)  and site (JGCA)  of nodal metastasis.
Follow-up and data analysis
All patients included in the study were regularly followed-up with a standardized protocol . The type of recurrence was classified as follows: (1) locoregional if tumor was detected in the surgical anastomosis, gastric bed, or abdominal lymph nodes; (2) peritoneal if tumor recurred as peritoneal carcinosis; (3) hematogenous if distant metastases were observed (liver, lung, bone, or lymph nodes outside the abdomen). Only the first site of relapse was taken into consideration. Any metastatic involvement observed after identification of the first recurrence was not considered. Survival curves were estimated using the Kaplan–Meier method and compared by the Log-rank test, with the time of survival measured from the date of hospital admission to the date of death. Analyses were performed using the Statistical Package for the Social Sciences, SPSS 16.0 for Windows, XP (SPSS, Chicago IL, USA).
Of the 102 patients with a median (range) age of 68 (29–89) years, a total of 45 were females. Table 1 reports the main demographic and clinical characteristics of the cohort under study.
After completion of the staging work-up, 92 patients underwent surgical exploration, while 10 patients did not. At the time of laparotomy, the tumor was judged non-resectable in 32 patients, whereas resective surgery was performed in 60. A palliative (R2) resection was carried out in 20 patients, microscopic residual (R1) tumor was observed in 12 (positive peritoneal washing in 9 cases and microscopic involvement of proximal resection margin in 3 cases), and the resection was considered potentially curative (R0) in 28. Overall, R0 resection was achieved in 27.5% of the patients.
At the follow-up end date, all the 102 patients were dead. The median (range) time of survival of the cohort was 5.7 (0.3–61) months. Seven patients died in hospital due to postoperative complications (3 cases) or disease progression (4 cases); 12 patients died within 30 days and 32 patients died within 90 days. Figure 1 depicts the time of survival for the 102 patients under study. Figure 2 shows the median time of survival according to the type of resection (no resection vs. R2 vs. R1 vs. R0). The percentages of R0 patients alive after 1, 2, 3, and 5 years were 68, 39, 14, and 4%, respectively.
Mode of recurrence
The mode of recurrence was recorded in 36 of the 40 patients in whom an R0 or R1 resection was achieved. In 4 patients (R0 in 3 cases) the cause of death remained unknown. The recurrence was locoregional in 8 patients (R0 in 5 cases), peritoneal in 18 (R0 in 14 cases), and locoregional and peritoneal in 5 (R0 in 3 cases), whereas a systemic component of the relapse was observed in 5 patients (R0 in 3 cases).
The main findings of this study were: (1) patients with GLP were mostly diagnosed at a very advanced stage; (2) a potentially curative (R0) resection was possible in <30% of the patients; (3) the chance of cure was null even after R0 resection; (4) on the whole, recurrences were intra-abdominal and were primarily related to peritoneal seeding.
Linitis plastica is a subset of diffuse gastric carcinoma with a propensity towards diffuse infiltration, massive lymph node metastasis, and peritoneal seeding. It is characterized by poorly differentiated tumor cells that diffusely infiltrate the gastric wall, thus provoking reactive fibrosis . The prognosis reported in the current literature remains extremely poor [8, 9].
Consistent with previous reports [10–12], also in our experience the diagnosis of GLP was established very late. The tumor was judged non-resectable in 41% of the patients and, when resected, it had generally infiltrated beyond the serosal layer (98%) and had nodal involvement (95%). The overall percentage of R0 resections was confirmed to be extremely low (27.5%).
The high number of explorative laparotomies and palliative resections indicates the inadequacy of the staging work-up adopted during the period of the study. The non-use of staging laparoscopy certainly represented the principal reason for this failure. Thus, staging laparoscopy has to be considered mandatory in the evaluation of GLP. It may have a role in confirming the diagnosis in doubtful cases, by demonstrating undiagnosed peritoneal seeding and by evaluating tumor resectability [13, 14]. Explorative laparotomy should be avoided completely, if we consider the minimal life expectancy of these patients (median survival time 2.8 months).
Considering survival results after potentially curative (R0) gastrectomies, no patient was alive at the end date of our study. The median survival time was 16 months and the percentages of patients alive after 1, 2, 3, and 5 years were 68, 39, 14, and 4%, respectively. Despite the extent of lymph node dissection, these data confirm previous experiences of GLP treated by primary surgery [2, 10–12] and they are comparable with cases of GC with positive peritoneal cytology [15, 16]. Like GC with positive peritoneal cytology, GLP showed an extremely high frequency of intra-abdominal (peritoneal and/or locoregional) recurrences. In our experience, a systemic component of the recurrence was observed in <15% of the patients. In GLP, the occurrence of the relapse is usually confined to the peritoneal cavity and the low incidence of systemic metastasis seems to indicate that the control of peritoneal seeding may provide a potential benefit. As has already been demonstrated for GC with positive peritoneal cytology or limited peritoneal carcinomatosis, hyperthermic intra-peritoneal chemotherapy (HIPEC) could represent an option in GLP and should be tested in specifically designed controlled studies [17–19].
As regards pre- or perioperative chemotherapy, GLP should be considered in multimodality treatment protocols, although no definitive and specific data are available on this entity in studies published to date [20–22]. In this regard, one should consider that a real significant benefit of actual chemotherapy agents in controlling peritoneal disease from GC has not been demonstrated [21, 23].
GLP represents a clinical burden for the surgeon due to the extremely poor results after primary surgery. Before surgeons lay down their arms and leave the treatment to palliative chemotherapy, specifically designed multimodality treatment protocols with preoperative chemotherapy and/or HIPEC should be tested. In this setting, an adequate preoperative work-up completed by a staging laparoscopy has to be considered mandatory.
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Conflict of interest
On behalf of the Italian Research Group for Gastric Cancer Study.
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Pedrazzani, C., Marrelli, D., Pacelli, F. et al. Gastric linitis plastica: which role for surgical resection?. Gastric Cancer 15, 56–60 (2012). https://doi.org/10.1007/s10120-011-0063-z
- Gastric cancer
- Linitis plastica