**Bladder Stones**

**Core Concept**
Bladder stones, also known as urolithiasis, are solid masses that form in the bladder due to the accumulation of minerals and salts in the urine. They can cause severe pain, urinary retention, and infection.

**Why the Correct Answer is Right**
The correct answer will address a characteristic or aspect of bladder stones that is not true. Bladder stones are often associated with urinary tract infections (UTIs), but the correct answer may involve a different aspect of bladder stones, such as their composition, formation, or symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** Bladder stones are typically composed of calcium oxalate, which is the most common type of kidney stone. This option may be true, so it's not the correct answer.
**Option B:** Bladder stones can cause severe urinary retention, which can lead to kidney damage if left untreated. This option is true, so it's not the correct answer.
**Option C:** Bladder stones are more common in men than women. This statement is true, so it's not the correct answer.
**Option D:** Bladder stones are always accompanied by a urinary tract infection (UTI). This statement is false because bladder stones can occur without a UTI.

**Clinical Pearl / High-Yield Fact**
Bladder stones are often associated with urinary retention, which can lead to kidney damage if left untreated. It's essential to recognize the symptoms of bladder stones, such as severe pain and difficulty urinating, and seek medical attention promptly.

**Correct Answer: D. Bladder stones are always accompanied by a urinary tract infection (UTI).**