title: Calyceal diverticulum: a benign imitator of serious pathology.
abstract: A 72-year-old man with lung cancer underwent positron emission tomography CT (PET-CT) as a part of cancer staging. As an incidental finding, the PET-CT revealed a renal mass with metabolic and morphological characteristics of a malignant tumour. A diagnostic CT scan revealed a Bosniak III renal cyst, and malignancy could not be excluded. For correct Bosniak classification, a multiphasic contrast-enhanced CT was performed and the renal mass was finally diagnosed as a calyceal diverticulum. This case report summarises how calyceal diverticula may mimic serious pathology, leading to diagnostic difficulties.
authors.affiliation: Department of Radiology, Hospital Littlebelt, Vejle, Denmark.
authors.forename: Anuj
authors.initials: A
authors.lastname: Pareek
authors.affiliation: Department of Respiratory Medicine, Odense University Hospital, Odense, Denmark.
authors.forename: Christian B
authors.initials: CB
authors.lastname: Laursen
authors.affiliation: Research Unit, Department of Radiology, Odense University Hospital, Odense, Denmark University of Southern Denmark, Institute of Clinical Research, Odense, Denmark.
authors.forename: Ole
authors.initials: O
authors.lastname: Graumann
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D004240:Diverticulum / Q000150:complications / Q000000981:diagnostic imaging*; D019788:Fluorodeoxyglucose F18; D006801:Humans; D033162:Incidental Findings; D052177:Kidney Diseases, Cystic / Q000150:complications / Q000000981:diagnostic imaging*; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging; D008175:Lung Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D009367:Neoplasm Staging; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18