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Collaborators Not applicable.
Contributors MRY has identified the patient, carried out the literature search and drafted the manuscript; PS has reported the radiology; CR has collected the data and helped in the literature search; JMKM revised the manuscript.
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.
Provenance and peer review Not commissioned; internally peer reviewed.