Liver scintigraphy in colon carcinoma: correlation with modified Duke pathological classification

Area of Science:

• Oncology
• Diagnostic Imaging

Background:

• Primary carcinoma of the large bowel frequently metastasizes to the liver.
• Accurate detection of liver metastasis is crucial for treatment planning and prognosis.

Purpose of the Study:

• To evaluate the sensitivity and specificity of hepatic scintigraphy in detecting liver metastasis in patients with large bowel carcinoma.
• To correlate scintigraphic findings with surgical exploration, pathologic classification, and tumor markers.

Main Methods:

• Hepatic scintigraphy was performed in 89 patients prior to surgical exploration for primary large bowel carcinoma.
• Scintigraphic results were correlated with surgical findings, modified Duke classification, and tumor markers.

Main Results:

• Hepatic scintigraphy demonstrated high sensitivity (96%) and specificity (98%) for detecting liver metastasis.
• 26% of patients had positive liver scans at diagnosis. Positive scans were strongly associated with abdominal lymph node involvement (91% of positive scans had positive nodes).
• A negative liver scan did not exclude regional lymph node metastasis (27% of normal scans had positive nodes).

Conclusions:

• Hepatic scintigraphy is a highly sensitive and specific tool for detecting liver metastasis in large bowel cancer.
• While effective for liver metastasis, a negative hepatic scintigraphy does not preclude the presence of abdominal lymph node spread.