[Endoscopic ultrasound guided fine needle aspiration biopsy: first experience in Mexico].
BACKGROUND
Endoscopic ultrasound (EUS) -guided fine-needle aspiration (FNA) is a recently described diagnostic method that has demonstrated its usefulness in certain clinical conditions.


METHODS
Descriptive and retrospective analysis of the initial experience with EUS-guided FNA at the Hospital General "Dr Manuel Gea González", during the period between March, 1998 and December, 1999. A Pentax FG 32UA linear echoendoscope was used for all cases, as well as two different types of needles. Procedures were performed under sedation and a cytopathologist was not present during the FNA. The biopsy site, quality of the material obtained, cytological as well as final diagnosis and complications are described.


RESULTS
A total of 40 procedures were done. FNA was performed on the pancreas, esophagus, stomach, duodenum, mediastinum, rectum and lymph nodes. A diagnosis was obtained in 75%. In the remaining cases, the material obtained was either inadequate or insufficient for diagnosis. FNA results were confirmed histologically in all cases that underwent surgery. Complication presented in 2.5%, and consisted of one case of self-limited and clinically irrelevant bleeding. The best results were obtained in lymph nodes, mediastinum, liver and pancreatic tumors.


CONCLUSIONS
This study demonstrated the utility of EUS-guided FNA to obtain cytologic material for diagnosis in a high percentage of cases and with minimal complications. Some factors that could lead to better results were also identified.
Guillermo de la Mora-Levy
José
J
Departamento de Gastroenterología, Hospital General Dr Manuel Gea González, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán. guillermodelamora@yahoo.com
Romero-Lagarza
Alma Penélope
AP
de Larios
Nassira M
NM
López-Acosta
María Elena
ME
Rodríguez-Vanegas
Gonzalo
G
Farca-Belsaguy
Alberto
A
D001707:Biopsy, Needle / Q000379:methods*; D019160:Endosonography; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D006801:Humans; D008800:Mexico; D012189:Retrospective Studies