## Surgical Management of Locally Advanced Gastric Cancer ### Clinical Assessment **Key Point:** This patient has a T2N1M0 gastric cancer (antral location, muscularis propria invasion, perigastric node involvement) — a locally advanced but potentially curative lesion. ### Rationale for Subtotal Gastrectomy 1. **Tumor location:** Antral tumors are in the distal stomach, allowing adequate proximal margin (≥5 cm) with subtotal resection. 2. **D2 lymphadenectomy:** Standard of care in curative-intent surgery for gastric cancer; removes perigastric (D1) and regional (D2) nodes. 3. **Billroth II reconstruction:** Preferred for antral tumors; avoids afferent loop syndrome and allows better emptying. 4. **Curative potential:** T2N1M0 disease has 5-year survival of 40–50% with adequate surgery; palliative approaches are inappropriate. ### Comparison of Gastrectomy Types | Feature | Subtotal (Distal) | Total | | --- | --- | --- | | **Indications** | Antral/pyloric tumors with adequate proximal margin | Proximal third, diffuse type, linitis plastica | | **Proximal margin needed** | ≥5 cm | ≥8 cm | | **Lymphadenectomy** | D2 standard | D2 standard | | **Reconstruction** | Billroth II preferred | Roux-en-Y preferred | | **Morbidity** | Lower (preserves fundus) | Higher (loss of acid secretion, reservoir) | | **Nutritional outcome** | Better long-term | Dumping, B12 deficiency more common | **High-Yield:** Subtotal gastrectomy is preferred for distal gastric cancers when an adequate proximal margin (≥5 cm) can be achieved; total gastrectomy is reserved for proximal tumors or when margin is inadequate. ### Why Not Total Gastrectomy? Although total gastrectomy is oncologically sound, it increases morbidity (loss of reservoir, acid secretion, higher risk of dumping and nutritional deficiency) without survival benefit for distal tumors with adequate margin achievable by subtotal resection [cite:Sabiston 21e Ch 49]. ### Why Not Palliative Bypass? This patient has no distant metastases and T2N1M0 disease carries a reasonable prognosis with curative surgery. Palliative bypass is reserved for unresectable or metastatic disease causing gastric outlet obstruction. ### Why Not Endoscopic Mucosal Resection (EMR)? EMR is appropriate only for early gastric cancer (T1a, <2 cm, no ulceration). This tumor is T2 with invasion into muscularis propria — far beyond the scope of endoscopic therapy. **Clinical Pearl:** The presence of perigastric lymph node involvement (N1) mandates formal D2 lymphadenectomy; sentinel node biopsy or limited dissection is inadequate.
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