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Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer

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Clear cell change in colonic polyps.

Catarina Eloy¹, José M Lopes, Gil Faria

¹Department of Pathology, Hospital de S. João, Institute of Molecular Pathology and Immunology of the University of Porto, Portugal.

International Journal of Surgical Pathology

|July 10, 2008

Summary

This summary is machine-generated.

Clear cell change in colorectal lesions, including polyps and adenomas, is not caused by glycogen or mucins. Ultrastructural analysis suggests a degenerative origin due to lipid-like material accumulation.

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Area of Science:

Gastroenterology
Pathology
Cell Biology

Background:

Clear cell change in colorectal epithelial lesions is a poorly understood phenomenon.
Investigating the cellular basis of clear cell change is crucial for understanding colorectal lesion development.

Observation:

Four cases with clear cell change (1 hyperplastic polyp, 3 adenomas) in the left colon were analyzed.
Histochemistry, immunohistochemistry, and electron microscopy were employed for detailed characterization.
One adenoma with clear cell features progressed to adenocarcinoma without clear cells.

Findings:

Cytoplasmic vacuoles in clear cells were negative for glycogen and mucins (MUC 2, MUC 5AC).
Ki-67 labeling index was lower in clear cell adenoma components compared to common adenoma components.
Ultrastructural examination revealed lipid-like material within the clear cell vacuoles, suggesting a degenerative process.

Implications:

Clear cell change in colorectal lesions is not attributed to glycogen or mucin accumulation.
The findings suggest a degenerative etiology for clear cell change, potentially linked to lipid metabolism.
Further research into the role of lipid accumulation in colorectal pathology is warranted.