Sjögren's Syndrome: Signs and Symptoms
Sjögren's syndrome presents with dry eyes (keratoconjunctivitis sicca) and dry mouth (xerostomia) as the cardinal features, accompanied by systemic manifestations including arthralgia, myalgia, and fatigue. 1
Primary Glandular Manifestations
Ocular symptoms result from lacrimal gland dysfunction due to lymphocytic infiltration and include:
- Dry, gritty sensation in the eyes
- Visual disturbances and photophobia
- Reduced tear production (Schirmer test ≤5 mm/5 minutes)
- Abnormal ocular staining score (≥5)
- Potential progression to scleritis, sterile keratitis, and uveitis 1
Oral symptoms arise from salivary gland compromise:
- Persistent dry mouth (xerostomia)
- Difficulty swallowing dry foods
- Recurrent parotid gland swelling
- Unstimulated salivary flow rate ≤0.1 ml/minute 2
Additional mucosal dryness affects:
- Nasal passages
- Trachea
- Vagina
- Skin (xeroderma) 3
Systemic Manifestations
Musculoskeletal symptoms are extremely common:
- Non-erosive polyarticular arthritis
- Arthralgia and myalgia
- These constitute part of the classic symptom triad with dryness 4
Profound fatigue significantly impairs quality of life and represents the third component of the hallmark symptom triad 2, 4
Extraglandular involvement occurs in 30-50% of patients and may include 4, 5:
- Raynaud's phenomenon
- Peripheral or central nervous system involvement
- Interstitial lung disease
- Kidney disease
- Cutaneous vasculitis
- Annular erythema
- Eyelid dermatitis
- Livedo reticularis 3
Associated Conditions and Complications
Autoimmune associations:
- Primary Sjögren's may present with thyroid dysfunction or autoimmune thyroiditis
- Secondary Sjögren's occurs with rheumatoid arthritis (20-32%), systemic lupus erythematosus (15-36%), or scleroderma (11-24%) 2, 5
Critical prognostic concern: Patients face increased risk for potentially life-threatening vasculitic or lymphoproliferative disorders, with approximately 5% developing non-Hodgkin B-cell lymphoma 2, 1, 5
Clinical Recognition Patterns
Suspect Sjögren's syndrome when:
- Intrinsic tear-production deficiency appears in non-elderly women
- Onset is rapid and/or severity is marked
- Dry eye symptoms are accompanied by systemic complaints 2
Diagnostic pitfall: The disease may present initially with extraglandular features (arthritis, Raynaud's, neurologic symptoms) rather than sicca symptoms, leading to diagnostic delays of several years 6
Demographics: Women are affected 20 times more frequently than men, with prevalence approximately 0.4% and annual incidence of 3.9-5.3 per 100,000 2, 1
Objective Diagnostic Findings
The pathologic hallmark is lymphocytic infiltration of lacrimal and salivary glands with secondary gland dysfunction 2, 1
Serologic markers:
- Anti-SSA/Ro antibodies
- Anti-La/SSB antibodies
- Rheumatoid factors
- Antinuclear antibodies 5
Important: About 10% of patients with clinically significant dry eye have underlying Sjögren's syndrome, and many remain undiagnosed at initial ophthalmology presentation 2, 1