A Movilia1, B De Servi, A Assi. 1. Unità Operativa di Anatomia e Istologia Patologica, Azienda Ospedaliera, Ospedale Civile di Legnano.
Abstract
UNLABELLED: The application of PCR to detect monoclonality at the immunoglobulin heavy chain gene locus in FNA cytologic specimens was evaluated. MATERIALS AND METHODS: Immunoglobulin heavy chain gene rearrangement analysis was performed by a nested PCR for the VDJ region on 27 lymph nodes FNA paraffin embedded by cell blocking technique specimens (1 suspicious of NOS lymphoma, 1 Hodgkin's disease, 6 B cell non Hodgkin's lymphomas, 10 reactive hyperplasias). RESULTS: A monoclonal band was seen in 13 of 17 suspicious or positive malignant cases. The other 4 specimens gave a policlonal pattern. Specimens from reactive lymph nodes produced policlonal bands in 8 cases, no product in 1 case and 1 specimen gave a monoclonal band. When needed, the results of PCR examinations were compared with the subsequent histologic evaluation of the same lymph-node. CONCLUSIONS: From our experience we can see that clonal analysis by PCR based IgH gene rearrangement analysis can be applied to FNA material and can be useful in diagnosis.
UNLABELLED: The application of PCR to detect monoclonality at the immunoglobulin heavy chain gene locus in FNA cytologic specimens was evaluated. MATERIALS AND METHODS: Immunoglobulin heavy chain gene rearrangement analysis was performed by a nested PCR for the VDJ region on 27 lymph nodes FNA paraffin embedded by cell blocking technique specimens (1 suspicious of NOS lymphoma, 1 Hodgkin's disease, 6 B cell non Hodgkin's lymphomas, 10 reactive hyperplasias). RESULTS: A monoclonal band was seen in 13 of 17 suspicious or positive malignant cases. The other 4 specimens gave a policlonal pattern. Specimens from reactive lymph nodes produced policlonal bands in 8 cases, no product in 1 case and 1 specimen gave a monoclonal band. When needed, the results of PCR examinations were compared with the subsequent histologic evaluation of the same lymph-node. CONCLUSIONS: From our experience we can see that clonal analysis by PCR based IgH gene rearrangement analysis can be applied to FNA material and can be useful in diagnosis.