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Zorluk: Çok zorGastroenterology and Hepatology

A 62-year-old man comes to the physician due to a 3-month history of progressive early satiety, postprandial epigastric pain, and an unintentional weight loss of 9 kg (20 lb). His past medical history is significant for a peptic ulcer associated with Helicobacter pylori infection treated 10 years ago. Vital signs are within normal limits. Physical examination reveals conjunctival pallor and mild epigastric tenderness on deep palpation, without rebound or guarding. Laboratory studies show a hemoglobin concentration of 9.2 g/dL and a mean corpuscular volume of 74 fL. Fecal occult blood testing is positive.

Arrange the following diagnostic and management steps in the most appropriate chronological order for this patient's suspected condition. Assume that each successive staging modality demonstrates localized, potentially curable disease without evidence of dissemination.

  1. 1Esophagogastroduodenoscopy (EGD) with targeted mucosal biopsy
  2. 2Computed tomography (CT) of the chest, abdomen, and pelvis
  3. 3Endoscopic ultrasound (EUS)
  4. 4Diagnostic laparoscopy with peritoneal washings
  5. 5Neoadjuvant chemotherapy followed by surgical resection

Cevap

The correct sequence is: EGD with mucosal biopsy, followed by CT of the chest, abdomen, and pelvis, then Endoscopic ultrasound (EUS), diagnostic laparoscopy, and finally neoadjuvant chemotherapy followed by surgical resection.
The correct sequence follows the core oncologic principle of progressing from diagnosis to non-invasive staging, then invasive staging, and finally treatment. Esophagogastroduodenoscopy (EGD) is the requisite first step to visualize the lesion and obtain a tissue diagnosis. Once gastric adenocarcinoma is confirmed, a CT scan of the chest, abdomen, and pelvis is obtained to rule out gross distant metastases (e.g., liver, lung). If the CT scan is negative for distant spread, Endoscopic Ultrasound (EUS) is performed for precise locoregional staging, assessing the depth of invasion (T stage) and regional lymph nodes (N stage). Because the patient is highly symptomatic with significant weight loss, indicating likely T3/T4 disease, diagnostic laparoscopy with peritoneal washings is the next mandatory step. This detects radiographically occult peritoneal carcinomatosis, which would preclude curative surgery. Finally, if all staging modalities confirm localized, curable disease, the patient proceeds to definitive treatment, which for advanced locoregional disease is typically neoadjuvant chemotherapy followed by surgical resection.

Adım Adım Çözüm

1
Identify the suspected diagnosis based on the clinical presentation.
The patient's early satiety, weight loss, iron deficiency anemia, and history of H. pylori point to gastric adenocarcinoma.
Recognizing the disease dictates the specific oncologic staging algorithm.
2
Select the modality for primary tissue diagnosis.
Esophagogastroduodenoscopy (EGD) with biopsy.
Oncologic staging cannot proceed without histologic confirmation of malignancy.
3
Select the initial, non-invasive staging modality.
Computed tomography (CT) of the chest, abdomen, and pelvis.
Non-invasive imaging is prioritized to detect gross distant metastases. If present, the goal of care shifts to palliation, sparing the patient further invasive testing.
4
Select the modality for locoregional staging.
Endoscopic ultrasound (EUS).
Once gross distant metastases are ruled out by CT, EUS accurately determines the depth of tumor invasion (T-stage) and regional lymph node involvement (N-stage).
5
Select the modality to rule out occult disseminated disease.
Diagnostic laparoscopy with peritoneal washings.
CT and EUS frequently miss peritoneal carcinomatosis in locoregionally advanced tumors. Laparoscopy is required to prevent an unnecessary morbid laparotomy.
6
Determine the definitive treatment.
Neoadjuvant chemotherapy followed by surgical resection.
With a fully staged, non-metastatic, locoregionally advanced gastric adenocarcinoma, multimodal curative therapy is the standard of care.

Anahtar Kavram

The diagnostic and staging sequence for gastric adenocarcinoma prioritizes establishing a tissue diagnosis, followed by non-invasive evaluation for distant metastases (CT), invasive locoregional staging (EUS), evaluation for occult peritoneal spread (laparoscopy), and finally definitive curative therapy.
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Gastroenterology and Hepatology

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