Gastroscopy & Colonoscopy

What are gastroscopy and colonoscopy?

Gastroscopy and colonoscopy are camera examinations of your digestive tract. A gastroscopy passes a thin, flexible scope through the mouth to inspect the esophagus, stomach, and duodenum; a colonoscopy examines the entire large intestine from the other direction. Screening centers in Taiwan routinely perform both in a single sedated session — you are asleep throughout, which is why the exam is known locally as "painless" (無痛) endoscopy.

Colonoscopy holds a distinction no other screening test can claim: it both finds and removes precancerous polyps in the same session — which is why it remains the gold standard for colorectal cancer prevention.

What can they detect?

Together, the two scopes screen for the two most common digestive cancers — colorectal and stomach — and the precancerous changes that precede them.

• Colonoscopy: polyps (removed on the spot), early colorectal cancer, inflammation, and diverticulosis
• Gastroscopy: stomach cancer, ulcers, gastritis, and reflux damage to the esophagus such as Barrett's changes

A same-visit H. pylori biopsy can usually be added to the gastroscopy — chronic H. pylori infection is the strongest known risk factor for stomach cancer. The current package listing shows exactly what is bookable today; your coordinator can add it when you book.

One honest limit: the scope sees the lining of the tract, not the solid organs around it. An abdominal ultrasound covers the liver, pancreas, and kidneys the endoscope passes by, and a comprehensive blood panel adds GI tumor markers and anemia checks.

Who should get screened?

US guidelines now recommend colorectal cancer screening from age 45 for average-risk adults — earlier if a parent or sibling had colorectal cancer or advanced polyps. The gastroscopy half matters especially for people of East Asian ancestry: stomach cancer rates are meaningfully higher across the region, which is why Taiwan, Japan, and Korea build upper endoscopy into check-ups from the 40s onward.

If you already have symptoms — unexplained anemia, bleeding, persistent reflux, changed bowel habits — mention them when booking: that shifts the exam from screening to diagnosis.

Prep and what to expect on the day

The procedure itself is the easy part; the bowel prep the night before is the demanding part. A clean colon lets the physician see every polyp, so do the prep exactly as instructed.

Below is the standard sequence for a combined session, as of July 2026. The hospital's own prep instructions — solution, diet, fasting cutoff, and recovery rules — take precedence, and your coordinator sends you the exact ones when you book:

1. 1
   The day before — bowel prep

   Light, low-fiber meals, then the prep solution in the evening with plenty of clear fluids. Expect to stay close to a bathroom.
2. 2
   Exam morning — fasting

   Nothing to eat or drink for several hours before check-in, so the stomach is empty for the gastroscopy and safe for sedation.
3. 3
   Both scopes under sedation — roughly 30–45 minutes

   A board-certified gastroenterologist performs both exams while you sleep, removing polyps and taking biopsies as needed.
4. 4
   Recovery — take the rest of the day off

   Rest until the sedation wears off, then hear the visual findings. No driving for the rest of the day.

Results and follow-up

You learn the visual findings the same day — the gastroenterologist can tell you what was seen and what was removed before you leave. Anything biopsied goes to pathology, and those results are folded into your written report; pathology turnaround and how the report reaches you after you fly home vary by hospital, and your coordinator confirms both when you book. A clean colonoscopy buys real time: guidelines allow up to ten years before the next one for average-risk adults, while removed polyps shorten the interval, depending on their number, size, and type.

Why do it in Taiwan?

Taiwan treats sedated endoscopy as routine preventive care rather than a hospital ordeal. Because stomach cancer is more common across East Asia, gastroenterologists here perform combined gastroscopy and colonoscopy at very high volume, and the sedated version is the standard offering — not a premium upgrade. In the US, a screening colonoscopy alone is commonly billed in the thousands of dollars; in Taiwan the sedated pair arrives inside a broader screening package, with an English report. The live prices below come straight from our booking system.