Oral Cavity Myeloid Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** An extramedullary myeloid tumor that arises from the oral cavity. It occurs de novo or can precede, coincide with, or follow the presentation of acute myeloid leukemia, or can constitute blastic transformation of a myelodysplastic syndrome or myeloproliferative neoplasm. (WHO 2017)