Colonic Adenocarcinoma Diagnosed by Contrast-Enhanced Ultrasound Combined with Percutaneous Ultrasound-Guided Biopsy after Failed Endoscopic Biopsy: A Case Report

Abstract

The pathological diagnosis of gastrointestinal masses may pose challenges to the gastroenterologist or surgeon as far as obtaining access and tissue diagnoses (Ballo and Guy, 2001). There are various types of colon tumors, including epithelial tumors (adenocarcinoma, adenosquamous carcinoma, undifferentiated carcinoma, etc.), mesenchymal tumors, and metastatic tumors. The treatment protocols are made according to the pathological type (Tarazona et al., 2020). Endoscopic biopsy is the most commonly used method for intestinal neoplasm (ASGE Standards of Practice Committee, 2010), but there are some limitations, such as discomfort in the examination process of patients with contraindications to anesthesia, difficulty in sampling due to the lesion morphology and regional necrosis. We present a case of colon adenocarcinoma diagnosed by contrast-enhanced ultrasound combined with percutaneous ultrasound-guided biopsy after failed endoscopic biopsy.