Metastatic liver tumors exceed 30 times the primary cases of liver cancer. They occur in every third cancer patient, regardless of the location of the primary focus and account for up to 95% of all malignant liver lesions. Fine needle aspiration biopsy (FNAB) and core biopsy are widely used methods for obtaining diagnostic material from pathological liver foci.
OBJECTIVE
To improve the efficiency of morphological diagnosis of liver metastases using modern methods of sample preparation of biological material obtained by FNAB.
MATERIAL AND METHODS
The data of cytological and immunocytochemical studies from 386 patients with pathological foci in the liver were analyzed. Cellular material for the study was obtained in two ways: with the help of FNAB and by smear-imprint from the core-biopsy column. Cell blocks (BC) and liquid cytology (LC) were used as additional methods for studying cellular material.
RESULTS
In samples of FNAB, the frequency of obtaining non-informative material is almost two times less than in impression smears from core biopsy. FNAB makes it possible to apply the LC technique, thereby concentrating, enriching diagnostic material, and using CB in standard immunohistochemical (IHC) protocols. Reliability in determining the presence of liver metastases in the cytological study of smears-imprints from core biopsy material — 78.3%, FNAB with traditional cytology — 71.8%, FNAB with traditional cytology, LC and CB — 91.5%. The possibilities of cytology for determining the histological type of tumor have been expanded due to the introduction of immunocytochemical (ICC) studies.
CONCLUSION
Thus, taking into account the minimally invasiveness of FNAB, taking into account the existing limitations in core-biopsy, cytological verification of liver metastatic foci can be considered as a complete morphological method for verifying the primary lesion.