Capsular pseudoinvasion after fine-needle aspiration of follicular adenomas of the thyroid
- Resource Type
- Authors
- Edgardo Almeida; Ana M. Paseyro; Raúl Morelli; Graciela Pedreira; Oscar Balboa; Gonzalo Ardao; Jorge Vercelli-Retta
- Source
- Diagnostic Cytopathology. 17:295-297
- Subject
- Adenoma
endocrine system
Pathology
medicine.medical_specialty
Histology
endocrine system diseases
Pathology and Forensic Medicine
Diagnosis, Differential
Follicular phase
Parenchyma
medicine
Humans
Neoplasm Invasiveness
Thyroid Neoplasms
medicine.diagnostic_test
business.industry
Biopsy, Needle
Thyroid
General Medicine
Middle Aged
medicine.disease
Fine-needle aspiration
medicine.anatomical_structure
Cytopathology
Female
Differential diagnosis
Complication
business
- Language
- ISSN
- 1097-0339
8755-1039
Two cases of an unusual finding of capsular pseudoinvasion in follicular thyroid adenomas after fine-needle aspiration (FNA) procedures are reported. These capsular breaches were noted along the hemorrhagic needle track, which traversed the normal peripheral thyroid parenchyma into the lesions. A reparative reaction was seen at some points along one of the tracks. Histologic examination also showed extrusion of the tumor parenchyma through the capsular interruption in one case. Surgical pathologists should be aware of this rare complication of FNA of thyroid follicular adenomas as a differential diagnosis of minimally invasive (encapsulated) follicular carcinoma.