1. KCP 775 신촌 세브란스 병원 R3 차윤진

2. 병력 63 세 남자 3 개월간의 기침, 가래, 보행시 호흡곤란 Chest CT – 우폐 중엽에 다수의 종괴

11. x400

12. 1.Moderate cellularity, clear background with mature-looking lymphoid cells 2. A loosely cohesive malignant epithelial cell cluster –Large irregular nuclei –High N/C ratio –Scant cytoplasm –Conspicuous nucleoli –Incipient rosette formation –Nuclear molding Positive for malignancy, metastatic carcinoma, poorly differentiated

13. Primary lung cancer Primary unknown carcinoma, metastasis to lung Mesothelioma, less likely

14. Non-small cell carcinoma –Squamous cell carcinoma –Adenocarcinoma Small cell carcinoma Differential diagnosis Adenocarcinoma, poorly differentiated Small cell carcinoma

15. AdenocarcinomaSmall cell carcinoma Large irregular nuclei OO High N/C ratio OO Scant cytoplasm O Conspicuous nucleoli O Incipient rosette formation OO Nuclear molding O

16. Diagnosis Metastatic poorly differentiated carcinoma, see note. Note) Biopsy is recommended.