**Core Concept**
Diffuse calcification of the pancreas involves the deposition of calcium salts in the pancreatic tissue. This condition is often seen in chronic pancreatitis, where recurrent inflammation leads to fibrosis and calcification.

**Why the Correct Answer is Right**
The correct answer is **within the intracellular spaces of the pancreatic cells**. In diffuse calcification, calcium ions accumulate within the cytoplasm and lysosomes of the pancreatic acinar cells. This process is facilitated by the release of lysosomal enzymes, which contribute to the degradation of cellular components and the subsequent deposition of calcium salts.

**Why Each Wrong Option is Incorrect**

* **Option A:** This option is incorrect because it does not specify the correct location of calcium deposition. While calcium can indeed accumulate in the pancreatic stroma, this is not the primary site of calcification in diffuse calcification of the pancreas.
* **Option B:** This option is incorrect because it refers to a condition where calcium deposition occurs in the pancreatic ducts, which is more characteristic of chronic pancreatitis with ductal calcification.
* **Option C:** This option is incorrect because it suggests that calcium lies in the bloodstream, which is not relevant to the pathophysiology of diffuse calcification of the pancreas.

**Clinical Pearl / High-Yield Fact**
A key feature of diffuse calcification of the pancreas is the presence of **multiple small, discrete calcifications** scattered throughout the pancreatic parenchyma. This finding can be a diagnostic clue on imaging studies, particularly on CT scans.

**Correct Answer: C.**