The evaluation of thyroid nodules by fine needle aspiration (FNA) is one of the most challenging tasks in all of cytopathology. A cytologist must understand the clinical presentation of thyroid diseases, their defining histopathologic and cytopathologic features, and even the intricacies of patient management. Drs. Clark and Faquin have provided a valuable framework for cytologists learning (and continuing to learn) this exacting discipline. Org-...