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Pseudopapillary solid cystic tumor arising from an extrapancreatic site
1Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan. maasafu@jikei.ac.jp
Archives of Pathology & Laboratory Medicine
|September 26, 2001
Summary
This case report details a rare omental pseudopapillary solid cystic tumor in a 46-year-old woman. Early diagnosis is crucial for effective treatment and patient outcomes.
Area of Science:
- Oncology
- Pathology
- Gastroenterology
Background:
- Pseudopapillary solid cystic tumors (PSCTs) are rare neoplasms, typically originating in the pancreas.
- Omental PSCTs are exceptionally uncommon, presenting diagnostic challenges.
Observation:
- A 46-year-old woman presented with a 5.2 cm omental tumor.
- Histological analysis revealed a mixed solid and pseudopapillary growth pattern.
- Immunohistochemistry showed positivity for vimentin, EMA, and alpha1-antichymotrypsin.
Findings:
- Ultrastructural examination indicated tumor cells with electron-dense granules, likely lysosomes.
- Flow cytometry demonstrated a diploid DNA content with a high S-phase fraction.
- The patient remained recurrence-free 3 months post-diagnosis.
Implications:
- This case highlights the importance of considering PSCT in the differential diagnosis of omental masses.
- Accurate histological and immunohistochemical characterization is vital for correct diagnosis.
- Further research into omental PSCTs may improve understanding and management of these rare tumors.