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Pathologic features of small hepatocellular carcinoma.
Acta Pathologica Japonica
|August 1, 1986
Summary
This study details diagnostic features of small hepatocellular carcinoma (HCC). Key findings include specific cellular and structural abnormalities aiding in the diagnosis of well-differentiated HCC and understanding tumor spread.
Area of Science:
- Hepatology
- Oncology
- Pathology
Background:
- Small hepatocellular carcinoma (HCC) presents diagnostic challenges.
- Understanding histological features is crucial for early detection and prognosis.
Purpose of the Study:
- To identify and describe key histological features for diagnosing well-differentiated small HCC.
- To elucidate patterns of invasive growth and tumor spread in small HCC.
Main Methods:
- Histological examination of 21 small hepatocellular carcinoma nodules.
- Analysis of cellular atypism, trabecular structure, and invasion patterns.
Main Results:
- Small HCC nodules exhibit plump trabeculae, nuclear atypism, and aggressive growth (capsular/vascular invasion).
- Diagnostic features of well-differentiated small HCC include distorted trabeculae, nuclear crowding, acinar formation, Mallory bodies, and altered nucleoli.
- Tumor cells may blend with benign hepatocytes ('mixed cellularity'), and pseudolobule septa facilitate rapid spread.
Conclusions:
- Specific histological findings are vital for diagnosing well-differentiated small HCC.
- Invasive growth patterns and routes of spread, such as pseudolobule septa, are important considerations.