Vascular and capsular pseudoinvasion in thyroid neoplasms.
The diagnosis of follicular carcinoma of the thyroid requires the identification of capsular and/or vascular invasion, with the exception of distant metastases. However, several artifacts may mimic both vascular and capsular invasion. This article presents two cases of pseudo invasion in encapsulated follicular neoplasms. Their differentiation from true vascular and capsular invasion is discussed and the criteria for true invasion are reviewed.
Chebib
Ivan
I
Department of Pathology and Laboratory Medicine, University of Calgary and Calgary Laboratory Services, Calgary, Alberta, Canada. ichebib@ucalgary.ca
Opher
Elana
E
Richardson
Mark E
ME
D018263:Adenocarcinoma, Follicular / Q000175:diagnosis*; D000236:Adenoma / Q000175:diagnosis*; D000328:Adult; D016477:Artifacts; D003937:Diagnosis, Differential; D003951:Diagnostic Errors / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009361:Neoplasm Invasiveness / Q000175:diagnosis; D013964:Thyroid Neoplasms / Q000175:diagnosis*