Needle rinse cell blocks as an ancillary technique: Diagnostic and clinical utility in gastrointestinal neoplasia

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Marrinhas, C (Author) Other; oliveira, l (Author) ICBAS; Sampaio, F (Author) ESEP; Moreira, R (Author) Other; Canadas Sousa, A (Author) Other; Pereira, A (Author) Other; Marta Susana Santos (Author) ICBAS; Marcos, R (Author) ICBAS

Journal

Title: Veterinary Clinical Pathology

Vol. 50

Pages: 47-54

ISSN: 0275-6382

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 6 Citations

Other information

Authenticus ID: P-00V-K3G

DOI: 10.1111/vcp.13073

Abstract (EN): Background Fine-needle aspirate (FNA) cytology is often the first-choice method for diagnosing gastrointestinal nodular lesions. The FNA material can be converted to histopathology specimens by a needle rinse cell block (NRCB) technique, allowing ancillary studies to refine the cytologic diagnosis. Despite use in human pathology, NRCB has never been applied to canine or feline gastrointestinal neoplasia. Objective This study described NRCB methodology and its diagnostic utility in specific cases of neoplastic gastrointestinal lesions. Methods Needle rinses with saline were performed after ultrasound-guided FNAs of two intestinal lymphomas (canine and feline) and a canine gastrointestinal stromal tumor (GIST). The NRCB was prepared using the cell tube block technique and processed for paraffin embedding. Routine immunohistochemistry protocols (using CD3, PAX-5, and Ki-67 for lymphoma cases and vimentin, desmin, S-100, and KIT markers for GIST) were applied to NRCB sections, and the results were compared with matched tissue biopsies. Results NRCBs with adequate cell numbers, preservation, and good separation of blood were obtained. The diagnosis and immunophenotyping were confirmed in both cases of lymphoma in NRCBs. In the GIST, the immunolabeling of the neoplastic cells in NRCB was completely concordant with the tissue biopsy. Conclusions The described methodology is suitable for veterinary settings, having few technical requirements and low invasiveness. The presented cases of gastrointestinal neoplasia highlight the utility of NRCBs as a platform to conduct ancillary studies and refine the cytologic diagnosis.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8