Gross Findings

The affected lesion shows a firm swelling tumorous mass. The pancreas head is more frequently affected than the body or tail. When narrowing of the MPD or large pancreatic duct is long or severe, distal parenchymal tissue might become markedly atrophic. The cut surface demonstrates a whitish-yellow mass with varying degrees of loss of normal lobular structure (fig. 1). The MPD is stenotic or narrowed, but usually remains identifiable despite involvement in the mass lesion. The intrapancreatic bile duct is usually involved when the pancreatic head is affected. The peripancreatic or regional lymph nodes are sometimes swollen. The entire pancreas is reported to be affected clinically. To our knowledge, however, such cases have not been resected or studied histopathologically.

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