Endoscopic Ultrasound (EUS)
Endoscopic Ultrasound (EUS) in Noida – Precision Imaging for Pancreatic, Liver & Complex GI Conditions
There are conditions that CT scans miss. There are lesions that MRI cannot characterise clearly enough. There are situations where a tissue diagnosis is needed but open surgery is not an option.
For all of these, Endoscopic Ultrasound is the answer.
EUS combines the reach of an endoscope with the precision of high-frequency ultrasound — positioning the imaging probe directly next to the organ being examined, from inside the digestive tract. The result is a level of image detail that no external scan can replicate for structures like the pancreas, bile ducts, stomach wall, and surrounding lymph nodes.
Dr. Sushrut Singh has completed a dedicated fellowship in Diagnostic and Therapeutic EUS and performs the full range of EUS procedures at Fortis Hospital, Noida. He is one of very few gastroenterologists in the NCR region with this level of specialised EUS training — making advanced pancreatic and biliary imaging available to patients in Noida without travelling to a Delhi tertiary centre.
What Is Endoscopic Ultrasound (EUS)?
A standard ultrasound probe sits on the outside of the body. It sends sound waves through the skin, through muscle and fat, through multiple layers of tissue — before it even reaches the organ it is trying to image. By the time the signal gets there and comes back, resolution is inevitably limited.
EUS removes all of that distance.
A specialised endoscope fitted with a high-frequency ultrasound transducer at its tip is passed through the mouth and positioned directly against the inner wall of the stomach or duodenum. The organ being imaged — the pancreas, bile ducts, liver, gallbladder, or lymph nodes — is now separated from the probe by only the thin wall of the stomach or intestine. The image quality is dramatically superior.
For structures like the pancreas — which sits deep in the abdomen, surrounded by bowel gas that disrupts external ultrasound — EUS is often the only way to get a truly clear picture.
Diagnostic EUS — What Conditions Can It Evaluate?
Pancreatic Masses and Cysts
Any mass or cyst found in the pancreas on CT or MRI requires further evaluation. EUS provides close-range, high-resolution imaging of the lesion — assessing its size, borders, internal characteristics, and relationship to surrounding blood vessels. In the same procedure, a needle biopsy (FNA or FNB) can be taken from the lesion for histological diagnosis, avoiding the need for surgical biopsy entirely.
Suspected Pancreatic Cancer
EUS plays a critical role in the staging and diagnosis of pancreatic cancer. It assesses local tumour extent, vascular involvement, and nearby lymph node status with greater accuracy than CT for early-stage tumours. Tissue sampling during EUS confirms the diagnosis and guides treatment planning — often before the patient undergoes any surgery.
Bile Duct Stones — Confirmation Before ERCP
In patients with suspected common bile duct stones where CT or MRCP is inconclusive, EUS confirms the presence, number, and size of stones with high accuracy — allowing Dr. Sushrut to plan the ERCP procedure precisely and reduce the risk of unnecessary intervention.
Bile Duct Strictures and Cholangiocarcinoma
EUS characterises bile duct strictures in detail and allows tissue sampling from the duct wall — distinguishing between benign inflammatory strictures and malignant cholangiocarcinoma (bile duct cancer). This distinction directly determines treatment.
Submucosal Tumours of the GI Tract
Lumps found beneath the surface of the oesophagus, stomach, or duodenum on routine endoscopy — called submucosal tumours — require further assessment to determine their layer of origin, size, and nature (GIST, lipoma, leiomyoma, carcinoid, and others). EUS identifies the layer the lesion arises from and its ultrasound characteristics, guiding the decision between surveillance, biopsy, and surgical removal.
Staging of GI Cancers
For oesophageal, gastric, and rectal cancers, accurate local staging — tumour depth (T stage) and lymph node involvement (N stage) — determines whether surgery is the first step or whether chemotherapy and radiotherapy should come first. EUS provides this staging information with greater accuracy for local disease than CT or PET scan.
Autoimmune Pancreatitis
EUS shows characteristic features of autoimmune pancreatitis — a diffusely enlarged, sausage-shaped pancreas with a peripheral halo — that can be confidently distinguished from pancreatic cancer in many cases, avoiding unnecessary surgery.
Mediastinal and Abdominal Lymph Node Assessment
Enlarged lymph nodes in the chest or upper abdomen — found on CT in patients being worked up for lung cancer, lymphoma, or oesophageal cancer — can be sampled under EUS guidance, providing tissue for diagnosis without surgical intervention.
Therapeutic EUS — Treatment Procedures
EUS is not only a diagnostic tool. In experienced hands it becomes a treatment platform — delivering therapy under real-time ultrasound guidance with precision that surgery cannot always match.
EUS-Guided Fine Needle Aspiration (FNA) and Fine Needle Biopsy (FNB)
The most common therapeutic EUS procedure. A thin needle is passed through the EUS scope and guided under real-time ultrasound imaging into a target lesion — most commonly a pancreatic mass, lymph node, liver lesion, or adrenal mass. The tissue sample obtained is sent to pathology for diagnosis. This replaces surgical biopsy for a large number of patients.
EUS-Guided Pseudocyst and Walled-Off Necrosis Drainage
Patients who develop pancreatic fluid collections — pseudocysts or walled-off necrosis — following acute pancreatitis often require drainage. EUS allows precise identification of the fluid collection and guided placement of a drainage stent directly from the stomach into the collection — draining it internally without any surgical incision. This is now the preferred approach for most symptomatic pancreatic fluid collections.
EUS-Guided Coeliac Plexus Block and Neurolysis
The coeliac plexus is a network of nerves that transmits pain signals from the pancreas and upper abdomen. In patients with severe, refractory pain from chronic pancreatitis or pancreatic cancer, EUS-guided injection of anaesthetic or neurolytic agents directly into the coeliac plexus provides significant and sustained pain relief — reducing or eliminating the need for high-dose opioid analgesia.
EUS-Guided Biliary Drainage
In patients where ERCP fails technically — due to altered anatomy after surgery, tumour obstruction of the duodenum, or inability to cannulate the bile duct — EUS-guided biliary drainage provides an alternative access route. The bile duct is punctured under EUS guidance from the stomach or duodenum and a stent is placed to restore bile flow, avoiding surgical biliary bypass in many cases.
EUS-Guided Vascular Procedures
Gastric varices and other GI vascular lesions can be treated under EUS guidance using glue injection or coiling, allowing precise targeting of the feeding vessel with real-time confirmation of obliteration.
EUS vs. CT Scan vs. Standard Ultrasound — Understanding the Difference
| Feature | EUS | CT Scan | Standard Ultrasound |
|---|---|---|---|
| Pancreas imaging quality | Excellent — probe adjacent to pancreas | Good for large lesions, misses small ones | Poor — bowel gas interferes |
| Detects lesions < 10mm | Yes — reliably | Often misses | Unreliable |
| Bile duct stone detection | Highly accurate | Moderate accuracy | Limited |
| Tissue sampling | Yes — in the same procedure | No | No |
| Vascular involvement assessment | Excellent for local vessels | Good | Limited |
| Radiation exposure | None | Yes | None |
| Requires sedation | Yes | No | No |
What to Expect During Your EUS at Fortis Noida
Preparation
- Upper EUS (stomach, pancreas, bile ducts): Fasting for 6–8 hours. No bowel preparation needed.
- Lower EUS (rectal): Bowel preparation similar to colonoscopy prep.
- Blood thinners may need to be paused before FNA or FNB — Dr. Sushrut's team will advise in advance.
During the Procedure
- Performed under IV sedation — most patients sleep through the procedure entirely.
- The EUS scope is passed through the mouth and positioned to obtain the best view of the target structure.
- Diagnostic EUS typically takes 20–40 minutes. Therapeutic procedures such as cyst drainage or coeliac plexus block may take longer.
- If FNA or FNB is being performed, a pathologist may be present in the room for Rapid On-Site Evaluation (ROSE) — confirming on the spot that the sample is adequate before the procedure is completed.
After the Procedure
- Most patients are discharged within 2–4 hours of completing the procedure.
- Mild throat discomfort and bloating are common and resolve within 24 hours.
- Dr. Sushrut will discuss preliminary findings before you leave.
- FNA or FNB pathology results typically return within 3–7 working days depending on the nature of the sample.
Why EUS changes the diagnosis in cases CT and MRI have not resolved
A significant proportion of patients referred to Dr. Sushrut for EUS come after CT or MRI has shown something abnormal — but not clearly enough to act on. A pancreatic lesion that could be cancer or could be an inflammatory mass. A bile duct stricture that could be malignant or benign. A submucosal lump the radiologist cannot characterise. EUS resolves these cases. In the same procedure, it provides the clearest possible image of the lesion and — if needed — a tissue diagnosis. For many patients, EUS is the step that finally gives them a definitive answer.
Frequently Asked Questions — Endoscopy in Noida
For evaluating small pancreatic lesions — masses, cysts, early tumours — EUS consistently provides superior resolution compared to CT because the probe is positioned directly adjacent to the pancreas from inside the stomach. EUS can detect lesions as small as 2–3mm that CT frequently misses. It also allows biopsy in the same sitting, which CT cannot do.
EUS is performed under IV sedation. Most patients have no memory of the procedure whatsoever and report no pain. There may be mild throat discomfort for 12–24 hours after the procedure — similar to what you might feel after a standard gastroscopy.
Both involve passing a needle through the EUS scope into a target lesion under ultrasound guidance. FNA (Fine Needle Aspiration) collects cells for cytological analysis. FNB (Fine Needle Biopsy) uses a specially designed needle that collects a core tissue sample — preserving the tissue architecture and allowing histological analysis, which is more informative for many diagnoses, particularly pancreatic and submucosal lesions.
In experienced hands with on-site pathology evaluation (ROSE), EUS-FNA/FNB achieves diagnostic accuracy of 85–95% for pancreatic masses. A negative result does not completely exclude malignancy — Dr. Sushrut will discuss the clinical context and whether repeat sampling or alternative investigation is needed if results are inconclusive.
Yes. Dr. Sushrut Singh performs both diagnostic and therapeutic EUS at Fortis Hospital, Sector 62, Noida. He is fellowship-trained in EUS and is one of the very few gastroenterologists in the NCR region offering this level of expertise locally.
Not always — it depends on the size, type, and characteristics of the cyst. Some small, simple-appearing pancreatic cysts can be monitored with interval CT or MRI. Others — particularly those with features suggesting mucinous cysts (which carry a risk of malignant transformation) or those growing over time — require EUS for characterisation and possible FNA. Dr. Sushrut will review your imaging and advise on whether EUS is indicated in your specific case.
MRCP (Magnetic Resonance Cholangiopancreatography) provides excellent non-invasive imaging of the bile and pancreatic ducts but has limitations in characterising small lesions or providing tissue diagnosis. EUS is often the logical next step when MRCP findings are inconclusive. Dr. Sushrut will review your MRCP report before your EUS appointment and tailor the procedure to answer the specific questions your imaging has raised.
Book Your EUS Consultation in Noida
If you have been referred for Endoscopic Ultrasound — or if you are experiencing unexplained abdominal pain, weight loss, jaundice, or have a pancreatic or bile duct finding on imaging that needs further investigation — consult Dr. Sushrut Singh at Fortis Hospital, Noida.
Available Monday to Saturday, 9 AM to 5:30 PM at Fortis Hospital, Sector 62, Noida. Also consulting at Gaur City Clinic, Greater Noida West — Mon–Sat 6–9:30 PM | Sun 12–3 PM.