# Obstructive Sialadenitis and Head and Neck Manifestations of Systemic Disease

## Introduction

Salivary gland disorders extend beyond isolated surgical pathology. **Obstructive sialadenitis** is the most common non-neoplastic salivary disorder, while numerous systemic diseases produce characteristic head and neck manifestations. This lecture covers the spectrum of inflammatory salivary disease and the key systemic conditions that the otolaryngologist must recognize.

## Obstructive Sialadenitis

### Pathophysiology
Obstruction of salivary flow leads to gland swelling, stasis, bacterial retrograde infection, and progressive glandular damage. Causes: **sialolithiasis** (most common), ductal strictures, mucous plugs, external compression. Repeated episodes lead to **chronic sialadenitis** with gland fibrosis and atrophy.

### Acute Suppurative Sialadenitis
Most commonly affects the **parotid gland** in debilitated, dehydrated, or postoperative patients. **Staphylococcus aureus** is the most common pathogen. Presentation: painful unilateral gland swelling, erythema, purulent discharge from duct orifice on bimanual compression. Treatment: IV antibiotics (antistaphylococcal coverage), hydration, warm compresses, sialagogues, gland massage. Abscess formation requires I&D or CT-guided aspiration.

### Chronic Sialadenitis
Results from recurrent episodes of obstruction and infection. Gland becomes fibrotic with dilated ducts (**sialectasis**) and lymphocytic infiltration. Imaging shows heterogeneous gland on ultrasound; sialography demonstrates "sausage-link" or "pruned tree" pattern. Management: sialendoscopy with ductal lavage (corticosteroid irrigation), gland excision for refractory cases.

### Juvenile Recurrent Parotitis (JRP)
Recurrent episodes of parotid swelling in children (ages 3-6, more common in boys). Second most common salivary disorder in children after mumps. Etiology unclear; possibly related to ductal anomalies, immune dysfunction, or genetic factors. Self-limited; usually resolves by puberty. Management: conservative (hydration, antibiotics during acute episodes, sialagogues); sialendoscopy with lavage for refractory cases.

![Ultrasound of a parotid gland showing heterogeneous echotexture and multiple hypoechoic areas consistent with chronic sialadenitis](/images/chronic-sialadenitis-ultrasound.jpg)

## Systemic Diseases with Head and Neck Manifestations

| Disease | Key H&N Manifestation | Diagnostic Test | Treatment |
|---------|----------------------|-----------------|-----------|
| Sjogren syndrome | Bilateral parotid swelling, xerostomia | Anti-SSA/SSB, minor SG biopsy | Sialagogues, immunomodulation |
| Sarcoidosis | Bilateral parotid enlargement, facial palsy (Heerfordt) | Non-caseating granulomas, elevated ACE | Corticosteroids |
| IgG4-related disease | Bilateral submandibular/parotid swelling | Elevated serum IgG4, storiform fibrosis on biopsy | Corticosteroids, rituximab |
| GPA (Wegener) | Nasal crusting, septal perforation, subglottic stenosis | c-ANCA (PR3), necrotizing granulomatous vasculitis | Cyclophosphamide/rituximab + steroids |
| Amyloidosis | Laryngeal deposits, macroglossia | Congo red stain, apple-green birefringence | Excision (localized); treat underlying cause |
| Relapsing polychondritis | Auricular chondritis (spares lobule), airway stenosis | Clinical diagnosis; biopsy | Steroids, immunosuppression |

### Sjogren Syndrome
**Chronic autoimmune disease** affecting exocrine glands (salivary and lacrimal). **Primary Sjogren**: sicca syndrome (dry eyes, dry mouth) without other connective tissue disease. **Secondary Sjogren**: associated with rheumatoid arthritis, SLE, or scleroderma. Presentation: bilateral parotid swelling, xerostomia, keratoconjunctivitis sicca, dental caries, oral candidiasis. Diagnosis: anti-SSA/Ro and anti-SSB/La antibodies, Schirmer test, minor salivary gland biopsy (focal lymphocytic sialadenitis, focus score >=1). **40-fold increased risk of lymphoma** (MALT lymphoma) — monitor for rapidly enlarging gland. Management: symptom management (saliva substitutes, pilocarpine, cevimeline), systemic immunomodulation for extraglandular manifestations.

### Sarcoidosis
**Non-caseating granulomatous disease** of unknown etiology. Head and neck involvement in 10-15% of cases. Manifestations: **bilateral parotid enlargement** (most common H&N finding), cervical lymphadenopathy, nasal mucosal disease (crusting, nodules, septal perforation), laryngeal involvement (epiglottic swelling), cranial neuropathies (facial nerve palsy — **Heerfordt syndrome**: parotid enlargement + facial palsy + uveitis + fever). Diagnosis: biopsy showing non-caseating granulomas; elevated ACE level; chest imaging (bilateral hilar lymphadenopathy). Treatment: systemic corticosteroids; steroid-sparing agents for refractory disease.

### IgG4-Related Disease
Fibroinflammatory condition with dense lymphoplasmacytic infiltrate rich in **IgG4-positive plasma cells**. Head and neck manifestations: bilateral submandibular or parotid swelling (previously called **Kuttner tumor** in submandibular gland or **Mikulicz disease**), lacrimal gland enlargement, orbital pseudotumor, thyroiditis (Riedel). Diagnosis: elevated serum IgG4, tissue biopsy showing storiform fibrosis, dense lymphoplasmacytic infiltrate, IgG4/IgG ratio >40%. Treatment: corticosteroids (dramatic response); rituximab for refractory cases.

### Granulomatosis with Polyangiitis (GPA, formerly Wegener)
**ANCA-associated vasculitis** affecting small and medium vessels. Head and neck involvement in 70-90%: nasal crusting, epistaxis, septal perforation, saddle nose deformity, subglottic stenosis, otitis media (serous), hearing loss, orbital mass. **Subglottic stenosis**: occurs in 15-25%; may require endoscopic management (dilation, steroid injection, laser). Diagnosis: c-ANCA (PR3-ANCA), tissue biopsy showing necrotizing granulomatous vasculitis. Treatment: cyclophosphamide + corticosteroids for induction; rituximab as alternative; maintenance with azathioprine or methotrexate.

![Endoscopic view of nasal crusting and septal perforation in a patient with granulomatosis with polyangiitis](/images/gpa-nasal-endoscopy.jpg)

### Amyloidosis
Deposition of insoluble amyloid fibrils in tissues. Head and neck: **laryngeal amyloidosis** (submucosal deposits causing hoarseness, airway obstruction); macroglossia; salivary gland enlargement. Diagnosis: biopsy with **Congo red staining** showing apple-green birefringence under polarized light. Laryngeal amyloidosis is usually localized (AL type); systemic workup to exclude systemic amyloidosis.

### Other Systemic Conditions
**HIV/AIDS**: diffuse parotid cysts (lymphoepithelial cysts), cervical lymphadenopathy, oral hairy leukoplakia, Kaposi sarcoma, nasopharyngeal lymphoma. **Diabetes mellitus**: increased risk of sialadenitis, deep neck infections, malignant otitis externa, rhinocerebral mucormycosis. **Thyroid disease**: goiter, thyroiditis, and associated laryngeal nerve dysfunction. **Relapsing polychondritis**: auricular chondritis (spares the lobule), nasal chondritis, laryngotracheal chondritis with airway stenosis.

![Clinical photograph of bilateral parotid enlargement in a patient with Sjogren syndrome](/images/sjogren-parotid-enlargement.jpg)

## Key Clinical Pearls

**Bilateral parotid swelling** should prompt evaluation for systemic disease (Sjogren, sarcoidosis, IgG4-related disease, HIV). Patients with Sjogren syndrome require long-term surveillance for **lymphoma** (MALT lymphoma). **Heerfordt syndrome** (uveoparotid fever) is the classic head and neck presentation of sarcoidosis. GPA is the most common cause of **non-traumatic saddle nose deformity** and should be considered in any patient with subglottic stenosis. IgG4-related disease can mimic salivary neoplasm — biopsy is essential before proceeding with excision. Always consider systemic etiologies when salivary gland disease is bilateral or recurrent without a clear obstructive cause.

## References

1. Mandel L, Surattanont F. Bilateral parotid swelling: a review. *Oral Surg Oral Med Oral Pathol Oral Radiol Endod*. 2002;93(3):221-237.
2. Ramos-Casals M, Brito-Zeron P, Siso-Almirall A, Bosch X. Primary Sjogren syndrome. *BMJ*. 2012;344:e3821.
3. Stone JH, Zen Y, Deshpande V. IgG4-related disease. *N Engl J Med*. 2012;366(6):539-551.
4. Langford CA, Sneller MC, Hallahan CW, et al. Clinical features and therapeutic management of subglottic stenosis in patients with Wegener's granulomatosis. *Arthritis Rheum*. 1996;39(10):1754-1760.