Wiki Unsure if cancer is a primary or secondary site

kseverson

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A patient has a breast sarcoma. The physician is not sure if this is the primary site or metastasis from another site.
How would you code this?
thanks!
 
Personally, I would do C50.919/C50.929, unless of course, laterality is known. The book only leads you to neoplasm of malignant breast, as the most unspecified.
 
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