Sialolith in the excretory duct, will result in:
**Core Concept**
Sialolithiasis refers to the formation of calculi (stones) within the salivary glands, particularly in the excretory ducts of the submandibular and parotid glands. This condition is characterized by the obstruction of saliva flow due to the presence of a sialolith, leading to symptoms such as pain, swelling, and difficulty swallowing.
**Why the Correct Answer is Right**
The correct answer is related to the mechanism of sialolithiasis. A sialolith in the excretory duct can cause obstruction of the saliva flow, leading to **inflammation and swelling of the gland**. The presence of a stone in the duct can also cause **pain and difficulty swallowing** due to the blockage of the gland's secretions. The correct answer is related to the clinical manifestation of sialolithiasis, which includes inflammation and pain.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not relate to the clinical manifestation of sialolithiasis. While a sialolith can cause pain and swelling, it does not directly cause a fistula.
**Option B:** This option is incorrect because it is not a direct consequence of sialolithiasis. While a sialolith can cause inflammation and pain, it does not directly cause an abscess.
**Option C:** This option is incorrect because it is not a direct consequence of sialolithiasis. While a sialolith can cause pain and swelling, it does not directly cause a malignancy.
**Clinical Pearl / High-Yield Fact**
A mnemonic to remember the symptoms of sialolithiasis is "PAIN": Pain, Abscess, Inflammation, and Numbness. This can help students recall the common symptoms associated with this condition.
**Correct Answer:** B.