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Pinto-Pais, T., Sousa-Fermandes, S., Pontes, J.M. et al. Atypical pelvic recurrence of anal squamous cell carcinoma: successful endoscopic ultrasound-guided fine-needle aspiration through the sigmoid colon. Int J Colorectal Dis 30, 139–140 (2015). https://doi.org/10.1007/s00384-014-1955-2
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DOI: https://doi.org/10.1007/s00384-014-1955-2