Related Experiment Videos
Gastrointestinal autonomic nerve tumor.
1Ultrastructural Pathology Section, National Institutes of Health, Bethesda, Maryland.
Ultrastructural Pathology
|January 1, 1991
Summary
Gastrointestinal autonomic nerve tumors, or plexosarcomas, are rare and difficult to diagnose. Electron microscopy is key for identifying these aggressive tumors, which present unique prognostic challenges.
Area of Science:
- Gastroenterology
- Oncology
- Pathology
Background:
- Gastrointestinal autonomic nerve tumors (plexosarcomas) are rare neoplasms.
- These tumors originate from the gastrointestinal autonomic plexus.
- They have significant, yet not fully understood, prognostic implications.
Observation:
- A case of a primary gastric plexosarcoma is presented.
- The tumor exhibited spindle-shaped and epithelioid cells with characteristic ultrastructural features.
- Diagnostic electron microscopic features were present, differentiating it from other GI tumors.
Findings:
- Diagnosis is challenging with light microscopy and immunocytochemistry alone.
- Electron microscopy revealed cytoplasmic processes with dense-core granules and intermediate filaments.
- Immunocytochemistry showed positivity for vimentin, neuron-specific enolase, and focal NFTP 160.
Implications:
- Plexosarcomas demonstrate an aggressive clinical course despite a low-grade appearance on light microscopy.
- This case presented with a high mitotic rate and in a younger patient, suggesting aggressive behavior.
- Accurate diagnosis via electron microscopy is crucial for understanding prognosis and guiding treatment.