Spine Pseudogout Following Breast Cancer Treatment: A Report of Two Cases.

Calcium pyrophosphate disease (CPPD) is a commonly diagnosed crystal-induced disease that typically presents as acute monoarticular or oligoarticular arthritis. It is less commonly seen in the spine, and its clinical importance in this area is still relatively understudied. Isolated spinal CPPD is quite rare; a diagnosis of spinal CPPD is almost always accompanied by peripheral CPPD. We present two patients who were both being treated for breast cancer. They underwent spine surgery and were subsequently diagnosed with isolated CPPD of the spine by pathology specimens. Neither patient had a history of CPPD prior to the surgery. We hypothesize there is a potential link between breast cancer and its treatment and isolated spinal CPPD; however, more research and case reports are needed to begin making conclusions and understand the relevance.
Competing Interests: Human subjects: Consent was obtained or waived by all participants in this study. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work.
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