Primary Extramedullary Acute Promyelocytic Leukemia Presenting as Cauda Equina Syndrome: A Rare Case Report and Diagnostic Challenge.

APL presenting as an extramedullary mass is exceedingly rare. Here, we describe extramedullary APL causing cauda equina syndrome, underscoring the diagnostic challenges associated with an atypical presentation, highlighting the complexity of distinguishing extramedullary APL from other conditions, and discussing the stepwise approach to diagnosis.