[Mast cells in calciphylactic pancreatitis].

Area of Science:

• Histology and Histochemistry
• Pathology
• Connective Tissue Biology

Context:

• Mast cells are present in pancreatic periductular and perivasal connective tissue, but absent in interacinar regions.
• Peripancreatic investing tissue contains a higher number of mast cells compared to the pancreas itself.
• Calciphylaxis, induced by Vitamin D2 and Ferric dextran, affects pancreatic interstitial tissue but spares peripancreatic tissue.

Purpose:

• To investigate the role of mast cells in pancreatic calciphylaxis.
• To determine if mastocalciphylaxis occurs in the pancreas under specific experimental conditions.

Summary:

• Histological and histochemical analysis revealed fewer mast cells in the pancreas compared to the peripancreatic tissue.
• Under calciphylactic conditions, only the pancreatic interstitium calcified, not the peripancreatic tissue.
• The findings suggest mast cells play a minor role in pancreatic calciphylaxis, refuting the existence of mastocalciphylaxis.

Impact:

• This research clarifies the limited involvement of mast cells in pancreatic calciphylaxis.
• It establishes that pancreatic calciphylaxis is primarily a reaction of collagenous connective tissue.
• The study differentiates between simple calciphylaxis and a potential mastocalciphylaxis, concluding the latter is not observed in this model.