Robotic Resection of Giant Duodenal Hamartoma After 18 Fluorodeoxyglucose Positron Emission Tomography Magnetic Resonance Imaging ( 18 FDG PET-MRI)

Brunner’s gland hamartoma is a rare duodenal lesion. Resection for benign neoplasms of the duodenum should be considered in case of malignant potential or in case of symptomatic lesions. An accurate preoperative staging is mandatory in order to allow minimally invasive surgical approach, and to avoid under- or overtreatment. Endoscopic ultrasonography (EUS), Computed tomography (CT) scan, Magnetic Resonance Imaging (MRI) and PET/CT are techniques widely used for gastrointestinal tumor staging. We report a case of a 41-year-old female presenting a giant lesion of the second portion of the duodenum. Pathological examination of multiple forceps biopsies was inconclusive for histological characterization of the lesion. After a clinical staging including Esophagusgastroduodenoscopy, EUS, and CT scan, a Hybrid ¹⁸FDG PET/MRI was performed to assess the malignant potential of the lesion and the relation between polyp base and Vater’s papilla. After multidisciplinary meeting, the patient underwent robotic transduodenal excision. The post-operative course was uneventful, and the patient was discharged on post-operative day 5. Final pathologic report consists in a histologically of Brunner’s Glands Hamartoma. This is the first report on the role of ¹⁸FDG PET/MRI in staging and planning treatment of bulky low malignant duodenal lesion. An accurate staging with ¹⁸FDG PET/MRI could be very useful in the planning the management of duodenal lesion with uncertain malignant potential in order to avoid under- and overtreatment.