Exceptional thyrolipoma and thymolipoma association: is there a syndrome?

Thyrolipoma and thymolipoma are rare neoplasms of the thyroid gland and thymus, respectively. Their simultaneous occurrence is exceptional. Up to now, only 2 cases have been reported in literature in 1966 and in 1997. For the first time, we report the occurrence of both neoplasms associated with myasthenia gravis in a 64-year-old woman. The value of this case report lies not only in the fact that it allows us to speculate on the presence of a syndrome but also because a complete radiological work-up (computed tomography scanner, magnetic resonance imaging, Positron emission tomography (PET) with fluorodeoxyglucose (FDG)) is reported.