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Inadvertent cannulation of secondary duct to accessory lobe of parotid during sialography

see: Sialograms and SialographyParotid Gland Accessory Lobe and Facial Process - Management Considerations

The inadvertent cannulation of a secondary duct during sialography is readily dectected as per below.  Similar cannulation may compromise unmonitored drug delivery (steroid / gene therapy) - and may be mitigated by concurrent ultarsound during the infusion as per:

Ultrasound Sialography (Ultrasound With Salivary Duct Infusion)

inadvertent cannulation of secondary duct to accessory lobe of parotid

see: Ultrasound Sialography (Ultrasound With Salivary Duct Infusion)

ultrasound sialography

References

Karagozoglu KH, Mahraoui A, Bot JCJ, Cha S, Ho JTF, Helder MN, Brand HS, Bartelink IH, Vissink A, Weisman GA, Jager DHJ. Intraoperative Visualization and Treatment of Salivary Gland Dysfunction in Sjögren's Syndrome Patients Using Contrast-Enhanced Ultrasound Sialendoscopy (CEUSS). J Clin Med. 2023 Jun 20;12(12):4152. doi: 10.3390/jcm12124152. PMID: 37373845; PMCID: PMC10298935.

Karagozoglu KH, Helder M, Bot J, Kamp O, Forouzanfar T, Brand HS, Cha S, Weisman G, Bartelink I, Vissink A, Jager DHJ. Intraoperative visualisation and treatment of salivary glands in Sjögren's syndrome by contrast-enhanced ultrasound sialendoscopy (CEUSS): protocol for a phase I single-centre, single-arm, exploratory study. BMJ Open. 2020 Sep 30;10(9):e033542. doi: 10.1136/bmjopen-2019-033542. PMID: 32998913; PMCID: PMC7528357.

Oh SH, Kang JH, Choi YJ, Kim BY, Lee SR, Lee SH, Choi YS, Hwang EH. Ultrasound-guided sialo-irrigation with a saline-air mixture as the contrast medium. Oral Radiol. 2019 Jan;35(1):84-89. doi: 10.1007/s11282-018-0331-2. Epub 2018 Apr 27. PMID: 30484189.

Oh SH, Seo YK, Kim GT, Choi YS, Hwang EH. Power Doppler ultrasound-guided sialography using the phenomenon of increased blood flow: A technical report. Imaging Sci Dent. 2019 Dec;49(4):301-306. doi: 10.5624/isd.2019.49.4.301. Epub 2019 Dec 24. PMID: 31915616; PMCID: PMC6941833.