Article Text
Image challenge
Man with left flank pain
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Footnotes
Twitter @Theodore_Tsai
Contributors GG was a major contributor in writing the manuscript. C-YS and T-YT revised the manuscript for intellectual content of the manuscript, the figures and the video.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting or dissemination plans of this research.
Provenance and peer review Not commissioned; internally peer reviewed.