Diagnostic Clues for Thyroid Fine Needle Aspiration Cytology -- Factors Impacting Thyroid Fine Needle Aspiration Cytology and Algorithm for Cytological Diagnosis -- False positive in Thyroid FNA: Causes and how to avoid them -- What's New in Thyroid Tumor Classification of the new WHO Classification of Endocrine Organs -- International comparison study of thyroid reporting systems -- Introiduction of the Italian Reporting System for Thyroid Cytology -- Introduction of the second edition Bethesda System for Reporting Thyroid Cytopathology -- Australian System for Reporting Thyroid Cytology -- Introduction of the British system for thyroid FNA cytology, including emphasis on multidisciplinary team discussion -- How to triage patients with indeterminate nodule by the Japan Thyroid Association clinical guidelines -- How to Follow Fine-needle Aspiration Biopsy-proven Benign Thyroid Nodules -- How to be considerate to patients with thyroid nodule, lesson from pediatric thyroid cancer screening program in Fukushima after nuclear plant accident -- LBC technique for thyroid FNA cytology -- Specimen adequacy in conventional smear and LBC preparation -- Cytological Features of Papillary Carcinoma on LBC Preparation, Compared with Conventional Preparation -- Cyst or Cystic Papillary Carcinoma -- Cyst Fluid Only Samples -- Thyroglossal Duct Cyst and Other Ectopic Thyroid Tissue in the Neck -- Pitfalls in the Diagnosis of Papillary Thyroid Carcinoma -- Pathologic Basis for Thyroid Ultrasound -- Nuclear features of PTC (BRAF-like tumor) and FA/FTC (RAS like tumor) -- Risk Stratification of Cases with Papillary Thyroid Carcinoma Type Nuclear Features into Low-risk, High-risk and Diagnostic of Malignancy in the Japanese System -- AUS/FLUS in the Bethesda system -- NIFTP in Asian practice -- NIFTP in Western practice -- Preoperative cytological diagnosis of NIFTP -- Tall Cell Variant of Papillary Thyroid Carcinoma vs. Conventional Papillary Thyroid Carcinoma -- Cribriform Variant of Papillary Thyroid Carcinoma -- Papillary Carcinoma, Columnar Cell Variant - Diagnostic Pitfalls and Differential Diagnoses -- Hobnail Variant of Papillary Thyroid Carcinoma -- Solid / trabecular variant of papillary thyroid carcinoma -- Oncocytic and non-oncocytic/ aggressive and non-aggressive variants of papillary carcinoma -- Subacute Thyroiditis or Papillary Carcinoma -- Hyalinizing Trabecular Tumor vs. Papillary Thyroid Carcinoma -- Hyalinizng trabecular tumor in HE samples -- Hashimoto's Thyroiditis or Papillary Carcinoma -- MALT Lymphoma vs. Hashimoto Thyroiditis -- Malignant lymphoma or metastatic epithelial tumors -- Medullary (C cell) Thyroid Carcinoma or Oxyphilic Follicular Neoplasms -- Medullary (C cell) Carcinoma or Metastatic Carcinoma to Thyroid -- Intrathyroid Thymic Carcinoma vs. Poorly Differentiated Carcinoma -- Parathyroid Adenoma and Its Differential Diagnoses -- Risk-classification of follicular pattern lesions in thyroid FNA cytology (part 1: benign follicular pattern lesion vs FN/SFN) -- Risk-classification of Follicular Pattern Lesions in Thyroid FNA Cytology (part 2: Follicular Adenoma and Follicular Carcinoma) -- Challenges encountered in the cytologic diagnosis of follicular neoplasm -- Hurthle cell neoplasms in HE samples -- Hurthle cell neoplasms in Papanicoloau samples -- Poorly Differentiated Carcinoma vs. Well Differentiated Carcinoma -- Poorly differentiated carcinoma and Anaplastic Carcinoma -- Anaplastic thyroid carcinoma in case-based outline -- Metastatic Renal Cell Carcinoma vs. Follicular Neoplasm -- Necrotic Background in Thyroid FNA Cytology: Anaplastic Transformation or Infarction in Papillary Carcinoma -- Infectious Thyroiditis -- Cytological characteristics related to treatment in Graves disease -- Cytological and histological characteristics after percutaneous ethanol injection and radiofrequency ablation in various thyroid nodules. -- Complications of Fine Needle Aspiration Biopsy -- Pitfalls in Immunocytochemical Study Using Fine Needle Aspiration Samples -- Biochemical Tests of Fine-needle Aspirate as An Adjunct to Cytological Diagnosis for Patients with Thyroid Cancer or Primary Hyperparathyroidism -- Experience in molecular testing using FNA cytology in EU countries -- Molecular testing of thyroid nodules using FNA cytology in USA -- Pitfalls of molecular tests in thyroid FNA cytology -- Pitfalls in Molecular-based Diagnosis Using Thyroid Cytology -- THE FNA CLINIC -- Techniques of Thyroid Fine-Needle Aspiration -- Core needle biopsy vs FNA cytology -- Standard and Rapid Stains in Fine-Needle Aspiration Cytology and Rapid On-Site Evaluation -- Quality Control for Cytology Laboratory in USA -- Pediatric thyroid cancer screening program in Fukushima after nuclear plant accident -- Pathology and cytology of thyroid diseases in pediatric population -- Pathology of radiation-induced thyroid cancer (Lesson from Chernobyl thyroid cancer study) -- A strategy to search for new cytologic criteria for differential diagnostics of thyroid cancers based on current (post-Chernobyl) practice in Ukraine.