Q18. A 74-year-old man underwent CT imaging for a saddle pulmonary embolism.

A 74-year-old man underwent CT imaging for a saddle pulmonary embolism. An incidental 1.7-cm right lower lobe pulmonary nodule was identified. He had a history of colorectal carcinoma and was a lifelong non-smoker. Fine-needle aspiration was performed. Which cytologic finding shown is most characteristic of pulmonary hamartoma?