1. KCP 778 토의자 가천대 길병원 R3 강명희 2013 년 4 월 5 일 세포병리학회 월례집담회

2. Clinical History 38 / F Chief complaint : mass on preauricular area (3 rd recurrence) Past history - 1998 total parotidectomy for parotid gland mass - 2010 excision (1 st recurrence) - 2011 excision (2 nd recurrence) No evidence of lymph node metastasis

11. Cytologic Characteristics 1.High cellularity 2.Single cells and loose clusters 3.Low nuclear grade 4.Vacuolated cytoplasm 5.Occasional signet ring cells 6.Intercellular and intracellular mucin and amorphous material

12. Differential diagnosis 1.Basal cell adenocarcinoma 2.Clear cell carcinoma, NOS 3.Epithelial-myoepithelial carcinoma 4.Polymorphous low-grade adenocarcinoma 5.Adenoid cystic carcinoma 6.Low-grade cribriform cystadenocarcinoma 7.Low-grade mucoepidermoid carcinoma 8.Acinic cell carcinoma

13. Differential diagnosis 1. Basal cell adenocarcinoma Basal cell adenocarcinoma KCP 778

14. Differential diagnosis 2. Clear cell carcinoma, NOS

15. Differential diagnosis 3. Epithelial-myoepithelial carcinoma

16. Differential diagnosis 4. Polymorphous low-grade adenocarcinoma

17. Differential diagnosis 5. Adenoid cystic carcinoma

18. Differential diagnosis 6. Low-grade cribriform cystadenocarcinoma

19. Differential diagnosis 7. Low-grade mucoepidermoid carcinoma

20. Differential diagnosis 8. Acinic cell carcinoma

22. High celluarity Cell dyshesion Numerous extracellular secretory material Mild nuclear atypia Benign or low-grade salivary gland neoplasm Abundant vacuolated cytoplasm

23. Final Diagnosis (KCP 778) Soft tissue, preauricular, left, aspiration cytology: Low-grade epithelial neoplasm

24. Thank you