Biopsy negative
Okasha, H. H., M. - N. A. S. Wifi, M. El-Nady, R. E. Mahdy, emad al-gemeie, W. El-Nabwey, W. M. Aref, A. A. - M. Al-Naggar, karim essam, and A. H. Ramadan,
"Role of endoscopic ultrasound and endoscopicultrasound-guided fine-needle aspiration in endoscopic biopsy negative gastrointestinal lesions",
endoscopic ultrasound journal, vol. 6, issue 3, pp. 156-61, 1975 Sep 01, 2017.