. Bilateral parotid enlargement occurs in all,except –
**Core Concept**
Bilateral parotid enlargement is a condition characterized by the swelling of both parotid glands, which are major salivary glands located in the face. This condition can be caused by various factors, including inflammatory, infectious, and neoplastic processes.
**Why the Correct Answer is Right**
The correct answer is related to the condition that does not typically cause bilateral parotid enlargement. Bilateral parotid enlargement is commonly associated with Sjögren's syndrome, a systemic autoimmune disorder that affects the exocrine glands. In Sjögren's syndrome, the parotid glands become enlarged due to chronic inflammation and lymphocytic infiltration. This leads to symptoms such as parotid gland swelling, pain, and decreased saliva production.
**Why Each Wrong Option is Incorrect**
**Option A:** Sarcoidosis is another systemic autoimmune disorder that can cause bilateral parotid enlargement. It is characterized by the formation of non-caseating granulomas in various organs, including the parotid glands.
**Option B:** Sjögren's syndrome is the correct association with bilateral parotid enlargement, so this option should not be considered.
**Option C:** Sickle cell disease can cause parotid gland enlargement due to recurrent episodes of sickling within the parotid gland tissue, leading to inflammation and swelling.
**Clinical Pearl / High-Yield Fact**
It is essential for clinicians to recognize the signs and symptoms of Sjögren's syndrome, including bilateral parotid enlargement, dry mouth, and dry eyes. Early diagnosis and treatment can help prevent long-term complications and improve quality of life for patients with this condition.
**Correct Answer:** B. Sjögren's syndrome is the condition most commonly associated with bilateral parotid enlargement.