Isolated delayed metastasis to the talus from Ewing's sarcoma

Isolated delayed metastasis to the talus from Ewing's sarcoma

Layla Nasr, Lena Naffaa, Alaeddine El Alayli, Miguel Abboud, Nabil J Khoury

Abstract


Bone metastasis to the hands and feet, known as acrometastasis, is a very rare finding and tends to be associated with extensive metastasis. We herein report the case of a 14-year-old girl known to have a history of successfully treated Ewing's sarcoma arising from the ribs, who presented with a pathologically proven isolated metastatic lesion to the talus 7 years after achieving clinical and radiologic remission. We describe the imaging findings on MRI, CT scan and PET-CT. To our knowledge, talar metastasis from Ewing's sarcoma has been previously reported only twice in the English literature. Noteworthy is the fact that one of the previously reported lesions was considered a skip metastasis, and the other was under-described in terms of primary and secondary tumor location and time to metastasis. In addition, the overall imaging findings were rather suggestive of a benign lesion, particularly on CT scan.

Keywords


Ewing Sarcoma; Talus; Bone metastases; CT scan; MRI; PET-scan



DOI: https://doi.org/10.3941/jrcr.v12i8.3164