Diagnostic Approach to Bilateral Submandibular Swelling

Primary Inflammatory and Autoimmune Causes

The American College of Rheumatology suggests that sarcoidosis is the leading differential diagnosis for bilateral salivary gland involvement, with symmetrical parotid and submandibular enlargement being a characteristic "probable" clinical feature 1
Parotid uptake on imaging is considered "highly probable" for sarcoidosis diagnosis, according to the European Respiratory Society 1
The American College of Physicians recommends looking for hypercalcemia/hypercalciuria with abnormal vitamin D metabolism and elevated ACE level (>50% upper limit of normal) in patients with suspected sarcoidosis 1
Biopsy demonstrates non-caseating granulomas with special stains negative for mycobacteria and fungi, as stated by the American Thoracic Society 1
The European League Against Rheumatism recommends serologic testing for anti-SSA/SSB antibodies and consideration of minor salivary gland biopsy for patients with suspected Sjögren's syndrome 2
The American College of Rheumatology suggests that IgG4-related disease can cause bilateral salivary gland swelling with characteristic IgG4+ plasma cell infiltration on histology 1

The American Academy of Otolaryngology-Head and Neck Surgery recommends considering HIV-associated salivary gland disease in patients with bilateral enlargement 3
The Infectious Diseases Society of America suggests that bilateral bacterial sialadenitis is less common but can occur with ductal obstruction or systemic predisposing factors 4

The American Cancer Society recommends that bilateral involvement with lymphadenopathy should raise suspicion for lymphoma 1
The National Comprehensive Cancer Network suggests looking for B symptoms: fever, weight loss, night sweats in patients with suspected lymphoma 1

The American College of Radiology recommends ultrasound as the preferred initial imaging modality for evaluating submandibular gland pathology due to effectiveness, safety, and accessibility 4, 5
The American Institute of Ultrasound in Medicine suggests that ultrasound can identify stones, masses, and assess glandular architecture 5
The American College of Physicians recommends complete blood count with differential (assess for eosinophilia) and serum ACE level and calcium/vitamin D metabolism studies (sarcoidosis) as part of the laboratory workup 1
The American Society for Clinical Pathology recommends fine needle aspiration or core biopsy of affected glands for definitive diagnosis 1
The College of American Pathologists suggests that histology identifies non-caseating granulomas (sarcoidosis), IgG4+ plasma cells, vasculitis, or malignancy 1