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Gastric cancer- surgical management.pptx

  1.  Management of 1. Early Gastric Cancer 2. Locally Advanced Gastric Cancer
  2.  Early gastric carcinoma (EGC) is defined by the WHO as invasive carcinoma of the stomach up to the submucosal layer, regardless of nodal status.  Role of EUS • To delineate T1/T2. • To perform EUS guided FNAC from perigastric nodes.
  3.  EUS is a valuable method for locoregional staging and presence of infiltrated paragastric lymph nodes in gastric cancer.  The accuracy of EUS-guided T-staging ranges in various studies between 60% and 90%; N-staging accuracies are somewhat lower.  Current data support that EUS-FNA could be integrated as a routine procedure in the preoperative staging of gastric cancer.
  4. T1a WD, <2cm, Yes ER No ulceration No D1 T1 N0 T1b WD, <2cm Yes D1 No D2
  5.  Locally advanced gastric carcinoma (AGC) is defined as clinical T2 disease and beyond with or without confirmed nodal involvement.  Extent of primary resection depends on:  Location  Margins
  6.  Lower – Distal Gastrectomy  Middle – Subtotal Gastrectomy Total Gastrectomy  Upper – Total Gastrectomy Proximal Gastrectomy
  7.  Gastrectomy with D2 lymph node dissection is the standard treatment for curable gastric cancer in East Asia
  8.  Why Surgery Upfront  Type of Surgery
  9.  The 5-year survival rates were 35% for D1 resection and 33% for D2 resection. There was no difference in the overall 5-year survival between the two arms (HR = 1.10, 95% CI 0.87–1.39).  These findings indicate that the classical Japanese D2 resection offers no survival advantage over D1 surgery.
  10.  711 patients (380 - D1 group and 331 - D2 group) were included.  Trend towards inreased overall survival D1 dissection D2 dissection P value Morbidity 25% 43% <0.001 Mortality 4% 10% 0.004 OS (11 yrs) 30% 35% 0.53
  11.  After a median follow-up of 15 years, D2 dissection was a/w  lower local recurrence (12% vs. 22%),  lower regional recurrence (13% vs. 19%), and  lower gastric cancer-related deaths (37% vs. 48%)  OS rates were similar between two groups (21% and 29%, p=0.34).  Because a safer, spleen-preserving D2 resection technique is currently available, D2 lymphadenectomy is the recommended surgical approach for patients with resectable gastric cancer.
  12.  Gastric resection should include the regional lymphatics— perigastric lymph nodes (D1) and those along the named vessels of the celiac axis (D2), with a goal of examining at least 16 or greater lymph nodes  Routine or prophylactic pancreatectomy is not recommended with D2 dissection, and splenectomy is acceptable only when the spleen or hilum is involved.
  13.  Why Not Periop CT
  14.  42 percent  perioperative-chemotherapy group completed all protocol treatment  34 percent  who completed preoperative chemotherapy & surgery did not begin postoperative chemotherapy, predominantly owing to early disease progression, patient request, or postoperative complications  Because this trial evaluated perioperative treatment, it is not possible to attribute the favorable outcome to preoperative or postoperative chemotherapy
  15.  Not all patients tolerate FLOT therapy  Incidence of diarrhea , neutropenia & neuropathy is more
  16.  Upfront surgery done ….  What next ??
  17.  Classic trial
  18.  Data from 17 trials involving 3838 patients.  OS benefit in favour of adjuvant CT  The absolute benefit was 5.9% at 5 years(49.6% to 55.3%).  Decreases the recurrence rate by 10%.  Benefit of adjuvant CT was demonstrated only in randomized trials following D2 lymph node dissection.
  19.  Surgical resection is recommended if tumour is outside of endoscopic resection – cT1a & > cT1 or cN+  Adjuvant chemotherapy is recommended in pathologic stage II , III after curative R0 surgical resection with D2 LN dissection
  20.  65 yr old gentleman , presenting with intermittent vomiting , loss of weight .  Diabetic . ECOG – 1 .  Blood investigations  OGD – mucosal thickening irregular margins body of stomach  HPE - infiltrating moderate – poorly differentiated adenocarcinoma – signet ring cell type
  21.  Ct scan – E/o irregular circumferential wall thickening – body of stomach .  Perigastric fat stranding  Perigastric lymph nodes
  22.  Planned for NACT  Received 1# CapeOx  Symptoms aggravated - ? disease progression - ? Intolerance to CT  Restaging done  Ct scan almost similar findings  Case discussed – surgery (total gastrectomy – D2 LN )  HPR – Adenocarcinoma – grade 3 Signet ring T3N2 (5 of 16 nodes + ENE +) Scheduled for adjuvant chemotherapy

Notas del editor

  1. Sensitivity: 85%, Specificity:90%
  2. For N staging, sensitivity:83%, specificity:67%
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