Case report: Successful treatment of a patient presenting with a very rare association of acute lymphoblastic leukemia and mucopolysaccharidosis type IVA.

Treating Acute Lymphoblastic Leukemia (ALL) in patients with genetic disorders poses significant challenges for onco-hematologists. Mucopolysaccharidosis type IVA (MPS-IVA) is a lysosomal storage disorder that clinically manifests with progressive and multi-systemic comorbidities, primarily affecting the bone, cartilage, spine, heart and lungs. We report a unique case of B-lineage ALL in a patient with MPS-IVA, who was successfully cured with a personalized chemo-radiotherapy approach. The treatment strategy aimed to balance a curative-intent chemotherapy attempt with the minimization of life-threatening complications. This case highlights the importance of individualized therapy in managing ALL in the context of complex comorbidities.