Messages from Kennichi Kakudo, MD, PhD to a person to be an expert of the cytopathology

I am delighted to announce that my book “The 3rd Edition, Thyroid FNA Cytology: Differential Diagnoses and Pitfalls” has just been published online (https://link.springer.com/book/10.1007/978-981-99-6782-7) . I found that the diagnostic criteria of malignancy by pathologists and clinical guidelines varied greatly from country to country.  Asian thyroid nodule practice necessitates adaptation under diverse conditions, such as diverse healthcare resources, health insurance coverage, social policies, and epidemiological differences. They were crystallized in textbooks, the first and second editions of The Thyroid FNA Cytology: Differential Diagnoses and Pitfalls, highlighting how thyroid nodule practice is handled differently in Asian countries. I wish to introduce the unique textbook Thyroid FNA Cytology: Differential Diagnoses and Pitfalls, published recently in its third edition from Springer, Singapore. This textbook helps endocrinologists, endocrine surgeons, radiologists, pathologists, and cytopathologists understand our diversity in thyroid nodule practice. To provide individualized guides to readers practicing in various geographic areas with different medical settings and social resources, the third edition tries to cover more than those provided by the first and second editions and invites authors from 21 countries in 95 chapters. The Thyroid FNA Cytology, Differential Diagnoses, and Pitfalls have intentionally provided several topics in duplicate chapters by different authors to show how they are handled differently so that readers may select the most suitable and appropriate one related to each reader’s thyroid practice and FNA cytology. I hope readers will enjoy reading these topics and compare their differences, as in any other existing textbooks on thyroid FNA cytology focusing on only one country. Understanding others is thought-provoking and can provide surprises on how thyroid FNA cytology is operated on differently among countries. I believe that this approach can increase knowledge and broaden perspectives.