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. 2019 Feb 5;5(1):E34–E51. doi: 10.1055/a-0825-6708

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Fig. 18 — a Anal carcinoma visualized with a linear endoanal ultrasound (EAUS) probe as a hypoechoic tumor mass (red arrows). b Targeted EAUS Trucut biopsy of the anal carcinoma (red arrows) (courtesy of Christian Nolsøe, Torben Lorentzen).