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Goblet-cell carcinoid tumor in peritoneal fluid: a case report
1Department of Pathology, Hutzel Hospital, Detroit, MI 48201.
Diagnostic Cytopathology
|January 1, 1991
Summary
This case study details a rare goblet-cell carcinoid found in peritoneal fluid, originating from a prior appendiceal carcinoid tumor. It highlights key cytologic and histologic features for diagnosing this unusual presentation.
Area of Science:
- Oncology
- Cytopathology
- Gastrointestinal Pathology
Background:
- Goblet-cell carcinoid (GCC) is a rare subtype of appendiceal neuroendocrine tumor.
- Metastasis of appendiceal GCC to peritoneal fluid is an uncommon event.
- Accurate cytologic and histologic diagnosis is crucial for patient management.
Observation:
- A 49-year-old female with a history of appendiceal carcinoid tumor presented with goblet-cell carcinoid in peritoneal fluid.
- Cytologic analysis revealed clusters of small cells with finely granular chromatin, prominent nucleoli, scant cytoplasm, and admixed signet-ring cells.
- Peritoneal biopsies showed malignant cells with carcinoid features, prominent signet-ring cells, and positive mucin staining.
Findings:
- Histologic examination confirmed goblet-cell carcinoid involving the peritoneal fluid.
- Tumor cells exhibited positive argyrophil and argentaffin staining, characteristic of endocrine tumors.
- Signet-ring cells and glandular lumens demonstrated strong mucin positivity, a hallmark of goblet-cell differentiation.
Implications:
- This case underscores the importance of recognizing goblet-cell carcinoid in peritoneal fluid cytology.
- Understanding the cytologic and histologic features aids in differentiating GCC from other peritoneal malignancies.
- Early and accurate diagnosis can guide appropriate treatment strategies for patients with metastatic carcinoid tumors.