How to perform endoscopic resection of submucosal esophageal lesions

Submucosal oesophageal lesions include lipomas, leiomyomas, granular cell tumours, gastrointestinal stromal tumours and duplication cysts. Although many are benign, symptoms, uncertain pathology or suspected malignancy may justify removal. Endoscopic therapy now allows tissue diagnosis and treatment in one session, provided lesion selection is rigorous. Learn more about リウマチ性疾患の胆道系疾患の診断と管理.

Endoscopic resection of submucosal esophageal lesions is appropriate only after defining the wall layer, size, symmetry, relation to the muscularis propria and metastatic risk. These features determine whether endoscopic mucosal resection (EMR), endoscopic submucosal dissection (ESD), tunneling or full-thickness techniques are suitable. Specialist assessment, endoscopic ultrasound and cross-sectional imaging should precede an attempted removal.

Define the lesion and exclude mimics

Begin with a working diagnosis. High-definition inspection and endoscopic ultrasound help establish whether a bulge arises from the submucosa, muscularis propria or an adjacent structure. Selective EUS-guided sampling may support a GIST diagnosis, although it is not required for every lesion. CT or MRI is useful when size, rapid growth, ulceration or suspicious nodes raises concern for malignancy.

An extraluminal mass can mimic a submucosal lesion. Pancreatic, vascular and biliary disorders belong in the differential; this Japanese-language review of biliary disease diagnosis provides background on one part of that differential. If EUS suggests compression rather than a primary oesophageal wall lesion, referral to the relevant specialist is safer than attempted resection.

Choose a resection strategy

Not every lesion needs complex dissection. A small, pedunculated or thin lesion may be removed with a snare or EMR. A broad-based lesion arising from the muscularis propria may require ESD, pocket-creation or submucosal tunneling, while endoscopic full-thickness resection (EFTR) is reserved for selected lesions with appropriate closure support.

Size thresholds are guides, not rules. A smooth 3 cm leiomyoma and an ulcerated 3 cm GIST are different problems. Growth pattern, layer of origin, surrounding tissue and operator experience matter. If haemostasis, defect closure or surgical backup is uncertain, a multidisciplinary discussion should choose a planned endoscopic attempt or surgery.

Prepare the patient and procedure

Preparation extends beyond fasting. Review anticoagulants, comorbidities, allergies and previous anaesthesia; confirm fasting, escort arrangements and access to pathology. Sedation or anaesthetic personnel, monitoring equipment and emergency support should match the anticipated procedure and lesion depth.

Australian pathways differ by setting. Public patients may face specialist and theatre waiting lists, while private care can usually be scheduled as a day case. Medicare and private insurance may cover part of the episode, but out-of-pocket gaps should be explained before consent. Regional patients may be assessed by telehealth and then referred to a metropolitan centre in Melbourne, Sydney, Brisbane or Perth, with travel and state patient-transport schemes considered. Australian teams commonly use terms such as “theatre”, “day case” and “scope”; these should be paired with plain-English instructions, interpreters and culturally safe communication.

Execute the resection

Begin only after agreeing on the approach, specimen handling and rescue plan. Inspect under white light and narrow-band imaging, note any capsule, and document the lesion’s relationship to the lumen. A submucosal injection may create a cushion for EMR, although muscularis-derived lesions often lift poorly. Marking the intended margin before incision helps maintain orientation during ESD.

For en bloc ESD, circumferential incision and submucosal dissection expose the lesion while preserving intact tissue where possible. A snare may complete a pocket-creation or tunneling strategy in selected cases. Treat visible vessels before withdrawal, then inspect the defect and use clips or another closure method when required. Retrieve and orient the specimen without fragmenting a suspected neoplasm.

Control complications and assess histology

The principal early risks are bleeding, perforation, aspiration and pain related to the mucosal defect. Control visible vessels before removing the scope. Small perforations may be closed with through-the-scope clips or an over-the-scope device, but a large defect, contamination or failed closure requires urgent surgical assessment. Every centre should have an after-hours pathway for post-procedure bleeding or perforation.

Pathology must be interpreted alongside the resection specimen, not the imaging appearance alone. Leiomyoma, lipoma, granular cell tumour and GIST have distinct microscopic and immunohistochemical patterns; malignant potential, margin status, ulceration and invasion depth influence management. Orientation and, when relevant, lymphovascular invasion should be documented. An indeterminate margin calls for multidisciplinary review rather than automatic repeat resection.

Arrange follow-up and quality assurance

Follow-up should match the histology and completeness of removal. A completely excised low-risk benign lesion may need only symptom-directed review, while GIST, malignant or indeterminate findings require coordination among the endoscopist, pathologist, surgeon and oncologist. Repeat endoscopy or imaging intervals should follow the relevant guideline and can include checks of the resection site, rather than relying on a fixed schedule for every lesion.

In Australia, discharge and pathology reports should reach the referring general practitioner and specialist team, with patient consent for sharing through My Health Record where appropriate. Regional follow-up can combine telehealth, local endoscopy and pathology services with tertiary-centre review. Patients need clear instructions on fever, severe chest or abdominal pain, vomiting blood or rapidly worsening swallowing that require same-day assessment.

Taken together, safe endoscopic removal depends on disciplined selection, accurate localisation, en bloc resection where feasible, secure defect management and histologically directed follow-up. The immediate next step for a scheduled case is a documented multidisciplinary review recording the lesion layer, intended technique, closure plan, surgical backup and follow-up owner before endoscopy begins.