Pathology of pancreatic neoplasms

Thomas Christopher Smyrk

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The term “pancreatic cancer” usually refers to ductal adenocarcinoma. While this entity accounts for 85% of primary pancreatic tumors, a variety of other neoplasms can arise from the range of cell types present in the normal pancreas (ducts, acini and islets) (Table 2.1) [1]. Approximately two-thirds of ductal adenocarcinomas are found in the head of the pancreas. The tumor tends to be very firm and ill-defined (Figure 2.1) Cystic change (usually due to tumor necrosis) can occur but is rare [2]. This is an aggressively infiltrating cancer with a propensity for direct invasion into distal common bile duct, ampulla of Vater, duodenum, blood vessels, nerves and extrapancreatic soft tissue, particularly posterior to the pancreas. Ductal adenocarcinoma is a gland-forming tumor. The glands tend to be round or only slightly angulated, giving the tumor a deceptively indolent appearance (Figure 2.2). There is almost always a dense stromal response to the tumor; this “desmoplastic stroma” of myofibroblasts and collagen can make it difficult to pick out the malignant cells. The glands may be lined by a single layer of cuboidal to columnar epithelium or may show complex papillary growth. Tumor nuclei usually vary in size and shape; in fact, the single most helpful diagnostic finding in a biopsy or cytologic preparation is a 4:1 variation in nuclear size within a single gland (Figure 2.3).

Original languageEnglish (US)
Title of host publicationPancreatic Cancer
PublisherCambridge University Press
Pages10-27
Number of pages18
ISBN (Print)9780511575440, 9780521886925
DOIs
StatePublished - Jan 1 2008

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ASJC Scopus subject areas

  • Medicine(all)

Cite this

Smyrk, T. C. (2008). Pathology of pancreatic neoplasms. In Pancreatic Cancer (pp. 10-27). Cambridge University Press. https://doi.org/10.1017/CBO9780511575440.004