Dr. Dana Hartl welcomes thyroid pathologist Dr. Zubair Baloch for a practical discussion of follicular-patterned thyroid lesions and why they remain challenging to classify. Dr. Baloch explains that “follicular” can describe both a cell of origin and a growth pattern, then walks listeners through the overlap among benign nodules, adenomas and carcinomas. He also clarifies why cytology can identify a follicular neoplasm but cannot reliably determine whether capsular or vascular invasion is present.
The conversation explores how invasion affects diagnosis and prognosis. Dr. Baloch distinguishes capsular invasion from angioinvasion, explains why adequate tumor sampling is essential and discusses how the extent of vascular invasion can change clinical risk. He emphasizes that pathology terminology must be precise and descriptive, particularly because patients may see their reports before speaking with their clinicians.
Dr. Hartl and Dr. Baloch also examine how molecular findings have reshaped thyroid tumor classification. They discuss the differing behavior of RAS-driven and BRAF-driven tumors, the separate classification of oncocytic carcinoma and the reasoning behind removing the word “carcinoma” from NIFTP. Dr. Baloch closes with a valuable reminder that pathology diagnoses should be grounded in everyday clinical practice, communicated clearly and written with patient management in mind.
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