Endoanal ultrasound

Endoanal ultrasound
Endoanal ultrasound
Purpose	images structures of anal canal

Last updated September 30, 2025

Endoanal ultrasound is a type of medical investigation which uses ultrasonography to show images of the structures of the anal canal.^[1] It is used in the investigation of some anorectal symptoms, e.g. fecal incontinence or obstructed defecation.^[2]

Endorectal ultrasound is a similar investigation but the ultrasound probe is used to image the rectum and surrounding tissues. It is used to image lesions in the rectum, for example a tumor caused by colorectal cancer and to assess local lymph node involvement.^[3]^[4]

References

↑ Santoro, Giulio A.; Falco, Giuseppe Di (2012). Atlas of Endoanal and Endorectal Ultrasonography: Staging and Treatment Options for Anorectal Cancer. Springer Science & Business Media. ISBN 978-88-470-2129-7 . Retrieved 23 November 2017.
↑ Zimmern, Philippe E.; Haab, Francois; Chapple, Christopher R. (2007). Vaginal Surgery for Incontinence and Prolapse. Springer Science & Business Media. p. 160. ISBN 978-1-84628-346-8 . Retrieved 23 November 2017.
↑ Maksim, R; Buczyńska, A; Sidorkiewicz, I; Krętowski, AJ; Sierko, E (16 July 2024). "Imaging and Metabolic Diagnostic Methods in the Stage Assessment of Rectal Cancer". Cancers. 16 (14): 2553. doi: 10.3390/cancers16142553 . PMC 11275086 . PMID 39061192.
↑ Opara, CO; Khan, FY; Kabiraj, DG; Kauser, H; Palakeel, JJ; Ali, M; Chaduvula, P; Chhabra, S; Lamsal Lamichhane, S; Ramesh, V; Mohammed, L (October 2022). "The Value of Magnetic Resonance Imaging and Endorectal Ultrasound for the Accurate Preoperative T-staging of Rectal Cancer". Cureus. 14 (10) e30499. doi: 10.7759/cureus.30499 . PMC 9674932 . PMID 36415358.

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[1] Santoro, Giulio A.; Falco, Giuseppe Di (2012). Atlas of Endoanal and Endorectal Ultrasonography: Staging and Treatment Options for Anorectal Cancer. Springer Science & Business Media. ISBN 978-88-470-2129-7 . Retrieved 23 November 2017.

[2] Zimmern, Philippe E.; Haab, Francois; Chapple, Christopher R. (2007). Vaginal Surgery for Incontinence and Prolapse. Springer Science & Business Media. p. 160. ISBN 978-1-84628-346-8 . Retrieved 23 November 2017.

[3] Maksim, R; Buczyńska, A; Sidorkiewicz, I; Krętowski, AJ; Sierko, E (16 July 2024). "Imaging and Metabolic Diagnostic Methods in the Stage Assessment of Rectal Cancer". Cancers. 16 (14): 2553. doi: 10.3390/cancers16142553 . PMC 11275086 . PMID 39061192.

[4] Opara, CO; Khan, FY; Kabiraj, DG; Kauser, H; Palakeel, JJ; Ali, M; Chaduvula, P; Chhabra, S; Lamsal Lamichhane, S; Ramesh, V; Mohammed, L (October 2022). "The Value of Magnetic Resonance Imaging and Endorectal Ultrasound for the Accurate Preoperative T-staging of Rectal Cancer". Cureus. 14 (10) e30499. doi: 10.7759/cureus.30499 . PMC 9674932 . PMID 36415358.

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