Unusual case of splenic sarcoidosis without morphological lesions detected by PET-CT in a patient with breast cancer: functional imaging between pitfalls and therapeutic guide

摘要

A 60-year-old woman under treatment with letrozole for metastatic breast cancer underwent 18F-FDG PET-CT for restaging. A new widespreadintense splenic FDG uptake without nodular lesions and multiple FDG-avid mediastinal and abdominal nodes were observed.Based on these findings, a nodal and transbronchial lung biopsy was performed. Histological results were compatible with sarcoidosis.The patient began steroid treatment and 6 weeks after a PET-CT showed normalisation of both splenic and nodal uptake. In our case,18F-FDG PET-CT has been useful in detecting a rare case of splenic sarcoidosis without typical nodular lesions on CT images, impactingthe patient’s treatment and prognosis.