**Core Concept**
Muriform cells are a type of epithelial cell characterized by their unique, barrel-shaped morphology. These cells are typically found in the context of certain types of kidney stones, where they contribute to the formation of the stone through the process of crystallization.

**Why the Correct Answer is Right**
Muriform cells are specifically associated with the formation of cystine stones, a type of kidney stone that occurs in individuals with cystinuria, a genetic disorder that affects the kidneys' ability to reabsorb cystine. These cells are thought to play a key role in the crystallization of cystine, leading to the formation of stones. The unique morphology of muriform cells allows them to facilitate the aggregation of cystine crystals, contributing to the growth and development of the stone.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because muriform cells are not typically associated with the formation of calcium oxalate stones, which are the most common type of kidney stone.
**Option B:** This option is incorrect because muriform cells are not related to the formation of uric acid stones, which are typically found in individuals with gout or other conditions that affect uric acid metabolism.
**Option C:** This option is incorrect because muriform cells are not associated with the formation of struvite stones, which are typically found in individuals with urinary tract infections caused by urease-producing bacteria.

**Clinical Pearl / High-Yield Fact**
It's worth noting that the presence of muriform cells can be an important diagnostic clue in the evaluation of kidney stones, particularly in individuals with cystinuria. The identification of these cells can help to confirm the diagnosis and guide treatment.

**Correct Answer:** D.