Desmoplastic Reaction
Pronunciation: dez-muh-PLAS-tik
Proliferation of fibrous connective tissue around a tumor, creating a dense stromal matrix that can influence drug penetration and tumor behavior.
Full Definition
A desmoplastic reaction refers to the formation of dense fibrous tissue in response to malignant invasion, particularly common in pancreatic and breast cancers. This stromal response creates a physical barrier that can impede drug delivery and contribute to treatment resistance. The reaction involves activated fibroblasts producing excessive collagen and other extracellular matrix components. Understanding desmoplastic patterns is crucial for pathologists in tumor grading and for oncologists in treatment planning, as it may necessitate combination therapies targeting both tumor cells and the surrounding stroma.
Usage
Usage note: Often hyphenated when used as a compound modifier (desmoplastic-reaction pattern).
In Context
- "The pathology report noted extensive desmoplastic reaction surrounding the primary tumor, suggesting potential challenges with systemic therapy penetration." — Pathology report
- "Treatment protocols for pancreatic adenocarcinoma must account for the characteristic desmoplastic reaction that limits drug accessibility." — Clinical protocol