Abstract
We present a case of bone metastases from a malignant peripheral nerve sheath tumor (MPNST). While multiple bone lesions typically are suggestive of metastatic disease, especially in combination with a primary tumor and positive PET, the appearance of lesions in this patient was quite atypical. We are not aware of any case of metastatic disease with such atypical doughnut appearance as in our case.
Highlights
Bone metastases are common in many tumors
A sarcoma is defined as a malignant peripheral nerve sheath tumor (MPNST) if it arises from a peripheral nerve, a preexisting benign nerve sheath tumor
We believe that the sclerotic margins around the central lytic area, as well as around the halo correspond to a bone reaction in an attempt to restrict the growth of the metastasis, and the rims do not contain malignant cells
Summary
Unusual CT Appearance of Bony Metastases from Malignant Peripheral Nerve Sheath Tumor. We present a case of bone metastases from a malignant peripheral nerve sheath tumor (MPNST). While multiple bone lesions typically are suggestive of metastatic disease, especially in combination with a primary tumor and positive PET, the appearance of lesions in this patient was quite atypical. We are not aware of any case of metastatic disease with such atypical doughnut appearance as in our case
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