AML and Myeloid sarcoma

Should AML and myeloid sarcoma be coded together?

There are no excludes notes under sarcoma (myeloid) for AML and no excludes notes under AML for Myeloid sarcoma.

Our 3M nosology does not bring up any notes regarding a problem coding both.

Myeloid sarcoma is defined as representing the tissue mass form of AML so in a way it is an equivalent dx.  However all patients do not have both the blood marrow  form and the tissue form. 

What is correct?

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