In the short report published by Siek and Spinek, the femoral metaphyseal lesion in question was described as potentially the first described case of a simple bone cyst (SBC) from a Polish background. However, on review of the single radiograph available, we feel the primary and differential diagnoses offered are misleading from a radiographic perspective, with the imaging features overall favoring fibrous dysplasia-probable cystic subtype. As magnetic resonance imaging (MRI) or a histological diagnosis would not be possible in skeletonized remains, the diagnosis must rest on opinion-based radiology. In this commentary, we illustrate why fibrous dysplasia is the most likely radiological diagnosis and describe why the differentials offered in the original article should not be entertained.