<prompt> Para meningeal Rhabdomyosarcoma is best diagnosed by :CT ScanMRISPECTPET  <response>: Ans. is b i.e. MRI I could not find any direct reference to this answer in all the books within my reach My answer is based on the basics of CT MRICT is the best inv. for bone imaging. It has limitations for soft tissues, especially when the soft tissue lies with a skeletal framework.But MRI is excellent for soft tissue imaging and is more sensitive in detecting early brain damage.So for a parameningeal rhabdomyosarcoma the best investigation would be MRI as it would demonstrate very clearly its extension within the meninges.Harrison 15e, on page 2337 states that the : Best investigation for a primary or metastatic brain tumor is - MRI Best investigation for meningeal disease - MRIThis information further supports my answer. 