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Κυριακή 15 Ιουλίου 2018

Multiple lesions of skull and cervical spine: a rare presentation of unicameral bone cysts

A 55-year-old man with a history of Benign Paroxysmal Positional Vertigo unalleviated by Epley manoeuvre presented to an otolaryngologist for dizziness, right ear fullness and headache. MRI of the brain showed numerous marrow-replacing lesions throughout the calvarium, skull base and upper cervical spine which were hypointense on T1-weighted images, hyperintense on T2-weighted images and avidly enhanced following contrast, concerning for a malignant process such as metastatic disease or multiple myeloma (figure 1). Systemic X-ray survey (spine, skull, chest, pelvis, all long bones) and nuclear medicine whole body bone scan were negative except for the lesions seen on MRI. β–2microglobin, immunoglobin and monoclonal protein electrophoresis were negative for myeloma or immunological process. Given the concern for metastatic disease, biopsy of a skull lesion was recommended. Pathological analysis of a calvarial lesion was consistent with unicameral bone cyst (figure 1). No ongoing therapy was offered; however, brain and spine surveillance imaging will continue.



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