Submucosal Tumor
Submucosal Tumor - Related Videos
04:09
The Pocket-Creation Procedure of Endoscopic Submucosal Dissection for Large Rectal Laterally Spreading Tumors
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Cited by 1 •
2026
This study details a standardized PCM-ESD protocol for resecting large rectal LSTs, aiming to enhance dissection speed and prevent transmural perforation via submucosal tunneling.
11:52
Isolation of Basal Cells and Submucosal Gland Duct Cells from Mouse Trachea
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Cited by 17 •
2012
Here we demonstrate our protocol for isolation of basal and submucosal gland duct cells from mouse tracheas. We also demonstrate the method of injecting stem cells into the dorsal mouse fat pad to create an in vivo model of submucosal gland regeneration.
05:57
ADSC-sheet Transplantation to Prevent Stricture after Extended Esophageal Endoscopic Submucosal Dissection
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Cited by 14 •
2017
This study reports a successful method of endoscopical adipose tissue-derived stromal cell (ADSC)-sheet transplantation for esophageal stricture prevention after an extended endoscopic submucosal dissection (ESD) in a swine model.
02:43
Tumor Implantation and Injection of a Tumor Vaccine in a Mouse Model
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2025
This video demonstrates a cell-based tumor vaccination assay. A mouse, intradermally injected with B16-F10 melanoma cells for tumor formation, is vaccinated with B16-F10 cells secreting Flt3L cytokine near the developed tumor. The secreted Flt3L from the vaccine promotes the maturation and proliferation of dendritic cells that then present tumor antigens to T cells in lymph nodes, triggering a targeted anti-tumor immune response.
04:04
Lateral Molar Approach-Driven Transoral Endoscopic Procedure for Benign Infratemporal Fossa Tumor Resection
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2025
Here, we present a protocol to resect benign infratemporal fossa tumors via an endoscopic-assisted transoral lateral molar approach with low-temperature plasma ablation and intraoperative mandibular nerve monitoring. This minimally invasive technique prioritizes anatomical preservation, functional recovery, and avoidance of external scarring, demonstrating feasibility for well-demarcated lesions ≤4 cm in diameter.
FAQs
The lesion’s apparent origin in the submucosa or muscularis propria is a key diagnostic feature. These layers lie beneath the intact mucosal surface, so a visible protrusion alone does not identify the tissue type or behavior. Establishing the involved layer helps clinicians interpret the lesion’s growth pattern, relate it to surrounding tissues, and decide whether further evaluation is needed.
An intact mucosal lining can make a deeper mass appear similar to a polyp, even though the underlying process may differ. The raised shape shows that tissue is displacing the surface, but it does not establish whether the lesion is benign or potentially malignant. Internal structure, depth, and growth pattern therefore provide important additional information.
Standard endoscopy reveals the protrusion and the condition of the overlying lining, whereas endoscopic ultrasound examines features beneath that surface. It can show the wall layer of origin, internal structure, and relationship to surrounding tissues. This added anatomical information supports more focused diagnostic decisions and helps determine whether surveillance, tissue sampling, or removal should be considered.
Clinicians consider the lesion’s appearance, growth pattern, tissue type, and behavior in relation to the gastrointestinal wall. These features help distinguish benign tumors from disease with potential malignancy. Symptoms also add clinical context: bleeding, obstruction, or abdominal discomfort may increase the importance of evaluation, although the visible protrusion itself cannot establish the diagnosis.
Evaluation generally begins with endoscopy to identify the raised lesion and assess its intact surface. Endoscopic ultrasound can then define the involved wall layer, internal structure, and nearby tissue relationships. When imaging and appearance do not provide enough diagnostic information, tissue sampling may support identification. The combined findings guide surveillance or removal decisions.
Tissue sampling is useful when the lesion requires additional diagnostic support beyond its endoscopic appearance and ultrasound findings. The sample may help clarify the tissue type and contribute to distinguishing a benign tumor from potentially malignant disease. Its role is therefore part of a broader evaluation that combines surface inspection, wall-layer imaging, and clinical findings.
Management depends on the lesion’s characteristics and the patient’s clinical presentation. A lesion may be monitored through surveillance when the overall assessment supports that approach, while endoscopic or surgical removal may be considered when removal is indicated. Symptoms such as bleeding, obstruction, or abdominal discomfort, together with imaging and tissue information, help guide that decision.