Myeloid sarcoma

Myeloid sarcoma is a rare solid tumor of the myelogenous cells occurring in an extramedullary site.

Osteoma cutis

The term osteoma refers to the anomalous presence of ossification (bone formation) in the interior of the dermis or epidermis. The dermal or subcutaneous bone formation presents as stony hard nodules. The osteomata appear as irregular, hardened small nodules that are well circumscribed and generally of the same color as the skin.


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PMID (PMCID)
24698478
 MALE
Extramedullary acute leukemia developing in a pre-existing osteoma cutis.
Wang JF, O'Malley DP.
J Cutan Pathol. 2014;41(7):606-11.
We report a case of a 45-year-old man who developed extramedullary acute leukemia with a myeloid immunophenotype (myeloid sarcoma) with its initial presentation within an isolated pre-existing osteoma cutis in the post-auricular scalp without evidence of systemic acute leukemia or chronic myeloid stem cell disorders.