Xerostomia, enlargement of salivary and lacrimal glands is seen in:
**Core Concept**
Sjögren's syndrome is an autoimmune disorder characterized by inflammation of exocrine glands, particularly the salivary and lacrimal glands, leading to symptoms of xerostomia (dry mouth) and xerophthalmia (dry eyes). The pathogenesis involves a complex interplay between autoreactive T cells, cytokines, and the production of autoantibodies.
**Why the Correct Answer is Right**
The correct answer is **Sjögren's syndrome**. This condition is characterized by the infiltration of lymphocytes into the exocrine glands, leading to destruction of the glandular tissue and subsequent reduction in glandular secretion. The involvement of the salivary and lacrimal glands results in symptoms of xerostomia and xerophthalmia. The presence of autoantibodies, particularly anti-SSA/Ro and anti-SSB/La, is also a hallmark of this condition.
**Why Each Wrong Option is Incorrect**
**Option A:** **Sarcoidosis** can cause enlargement of salivary and lacrimal glands, but it is not typically associated with xerostomia and xerophthalmia as seen in Sjögren's syndrome.
**Option B:** **Sjögren's-like syndrome** can be seen in patients with systemic lupus erythematosus (SLE), but it is not a distinct entity and does not encompass the full spectrum of Sjögren's syndrome.
**Option C:** **Sarcoidosis with Sjögren's syndrome overlap** is a rare condition, but it is not a primary diagnosis that encompasses the characteristic symptoms of xerostomia and xerophthalmia.
**Option D:** **Viral infections** can cause transient enlargement of salivary and lacrimal glands, but they do not lead to chronic symptoms of xerostomia and xerophthalmia.
**Clinical Pearl / High-Yield Fact**
Sjögren's syndrome can be associated with other autoimmune disorders, such as rheumatoid arthritis, systemic lupus erythematosus, and thyroiditis, making it essential to consider this condition in patients with multiple autoimmune symptoms.
**Correct Answer: D. Viral infections.**