醫學五：80題 ( 包括外科,骨科,泌尿科等科目及其相關臨床實例與醫學倫理 )題庫下載題庫

(A)Hot nodule usually excludes neoplasm.(B)The cancer-predictive value of these characteristics varies widely and are cumulative; those with the highest clinical utility include microcalcifications, increased internal vascularity, taller than wide shape, indistinct margins (especially when they are focal), and hypoechogenicity. Although ultrasound cannot be used to definitively diagnose thyroid cancer or select patients for thyroid surgery, ultrasound findings offer important clues and can be used to select nodules for fine-needle aspiration (FNA) biopsy, which offers the best preoperative ide...
查看完整內容

(C)Since FNA samples only a portion of the nodule, surgical excision and extensive sectioning are required to determine if a microfollicular lesion is benign or malignant. Microfollicular nodules that do not show vascular or capsular invasion after surgical excision are considered benign, while those that demonstrate even focal microscopic invasion are classified as follicular carcinomas