Table 1: Patient Demographics and Pathological Diagnosis.

Case number Age Sex Site Cytologic diagnosis Histologic diagnosis 1 38 M Soft palate Mixed microbial infection with necrosis NA 2 51 M Oropharynx Abscess Granulation tissue with acute and chronic inflammation 3 4 M Cheek Acute and chronic inflammation Mixed microbial infection with necrosis 4 44 M R mandibular Marked Acute inflammation and granulation tissue NA 5 3 M L cheek CI, NEM Chronic inflammation 6 23 F L retropharyngeal Benign squamous-lined cyst Branchial cleft cyst 7 70 M R maxillary sinus NEM, c/w cyst Chronic inflammation and fibrosis 8 15 M Floor of mouth NEM, c/w cyst NA 9 24 M Hard palate NEM, c/w cyst Nasopalatine cyst 10 35 M Tonsil Benign squamous cells NA 11 50 F L cheek NEM NSPC 12 42 F R floor of mouth NEM NA 13 41 M L cheek NEM NA 14 75 M R parapharyngeal Oncocytic lesion, c/w Warthin’s tumor Warthin’s tumor 15 51 M Midline hard palate PA PA 16 23 M R parapharyngeal PA PA 17 61 F R palate PA PA 18 58 M R palate Atypical squamous proliferation PA with extensive squamous metaplasia 19 91 F R cheek SCC Invasive SCC 20 44 F L pharaynx SCC Invasive SCC 21 73 M L hard palate Adenoid cystic carcinoma Adenoid cystic carcinoma 22 56 M R upper palate Poorly differentiated carcinoma High-grade adenoid cystic carcinoma 23 43 F L palate Basaloid neoplasm PLGA 24 48 F L palate Basaloid neoplasm PLGA 25 63 F R hard palate c/w B cell lymphoma* Follicular lymphoma 26 76 M Larynx c/w chondrosarcoma Low-grade chondrosarcoma 27 62 F L retropharyngeal Metastatic poorly differentiated carcinoma Correlated with prior head and neck primary resection 28 60 M R cheek Metastatic adenocarcinoma Correlated with prior head and neck primary resection

*Flow cytometry study performed. C/w: consistent with; L: left; NEM: No evidence of malignancy; NSPC: no significant pathologic changes; PA: pleomorphic adenoma; PLGA: polymorphous low-grade adenocarcinoma; R: right; SCC: squamous cell carcinoma. NA: no histologic followup available/case followed clinically.