Esophagus - GERD & Carcinoma MCQs

Investigation Endoscopy is the first-line investigation for most patients. It provides an unrivalled direct view of the oesophageal mucosa and any lesion allowing its site and size to be documented. Cytology and/or histology specimens taken via the endoscope are crucial for accurate diagnosis. The combination of histology and cytology increases the diagnostic accuracy to more than 95%. The chief limitation of conventional endoscopy is that only the mucosal surface can be studied and biopsied. Other investigations are therefore usually required to define the extent of local or distant spread. The improved image resolution of modern endoscopes and novel techniques involving magnification and the use of dyes to enhance surface detail may lead to more early lesions being recognised. Reference : Bailey & Love's short practice of surgery, chapter: 66, Edition: 28th, Pg: 1136-1137

PRINCIPLES The principle of oesophagectomy is to deal adequately with the local tumour in order to minimise the risk of local recurrence and achieve an adequate lymphadenectomy to reduce the risk of staging error. Although studies in Japan would indicate that more extensive lymphadenectomy is associated with better survival, this may simply reflect more accurate staging. A number of studies support the view that the proximal extent of resection should ideally be 10 cm above the macroscopic tumour and 5 cm distal. When such a margin cannot be achieved proximally, particularly with squamous cell carcinoma, there is evidence that postoperative radiotherapy can minimise local recurrence, although this does not improve survival. Reference : Bailey & Love's short practice of surgery, chapter: 66, Edition: 28th, Pg: 1141

Carcinoma esophagus REF: sabiston's 18' edition chapter 41 See table in the previous question "Rat-tail" appearance on barium study is seen in carcinoma esophagus.

Explanation: 24-hour ambulatory pH monitoring is considered the gold standard for objectively diagnosing GERD. It directly measures the frequency and duration of acid reflux episodes (pH Explanation of other options: Upper GI endoscopy (Option B): Endoscopy is excellent for visualizing complications of GERD (esophagitis, Barrett's esophagus, strictures) but is often normal in patients with non-erosive reflux disease (NERD), making it less sensitive for establishing the initial diagnosis. CECT & MRI (Options C and D): Cross-sectional imaging like CT and MRI have no role in the routine diagnosis of GERD, as they cannot detect acid reflux. Key Takeaways: 24-hour pH monitoring is the gold standard for diagnosing GERD. Endoscopy is used to assess for complications, not primarily for diagnosis.

The symptoms of gastric cancer are generally vague and nonspecific, contributing to its frequently advanced stage at the time of diagnosis. Symptoms include epigastric pain, early satiety, and weight loss . These symptoms are frequently mistaken for more common benign causes of dyspepsia including PUD and gastritis. The epigastric pain associated with gastric cancer tends to be constant and non radiating and is generally not relieved by eating. More advanced lesions may manifest with either gastric outlet obstruction or/strong> dysphagia depending on the location of the tumor. Some degree of GI bleeding is common, with 40% of patients having some form of anemia. Reference: Sabiston textbook of Surgery, chapter: 49, Edition: 21st, Pg: 1222

These are tumours of the parafollicular (C cells) derived from the neural crest. rather than the cells of the thyroid follicle as are other primary thyroid carcinomas. The cells are not unlike those of a carcinoid tumour and on histological analysis a characteristic amyloid stroma is seen. High levels of serum calcitonin and carcinoembryonic antigen are produced by many medullary tumours, which should be tested for in suspected cases. Calcitonin levels fall after resection and rise again with recurrence, making it a valuable tumour marker in the follow-up of patients with this disease. Diarrhoea is a feature in 30% of cases and this may be due to 5-hydroxytryptamine or prostaglandins produced by the tumour cells. Reference : Bailey & Love's short practice of surgery, chapter: 55, Edition: 28th, Pg: 870-871