Primary breast osteosarcoma: dynamic contrast-enhanced magnetic resonance imaging, proton spectroscopy and diffusion weighted imaging findings.

Dear Editor, Primary pure osteosarcoma of the breast is a rare malignant tumour and is histologically indistinguishable from conventional osteosarcoma of the bone and other extraskeletal sites. Being a rare entity that is briefl y reported in the radiology literature, it has some interesting imaging features worthy of discussion. Here we report the novel fi ndings of dynamic contrast-enhanced MRI (DCEMRI), diffusion weighted imaging and MR spectroscopy of primary breast osteosarcoma which has never been previously reported.