Infantile T-cell Acute Lymphoblastic Leukaemia: A Case Report.

Introduction: Acute lymphoblastic leukaemia (ALL) is the most common malignancy in children, with a male predominance. Paediatric ALL is usually of B-cell lineage; T-cell leukaemia is uncommon and extremely rare under 1 year of age. Mixed-lineage leukaemia gene rearrangement is the best-known hallmark of infantile leukaemia and is a poor prognostic indicator. While multiagent high-dose chemotherapy remains the first line of treatment for paediatric T-cell lineage ALL (T-ALL), there are numerous side effects of these regimens, and most patients undergo relapse. Due to the rarity of the disease, treatment protocols for infantile T-ALL have not been established to date.

Clinical description: We present a case of a 7-month-old Pakistani male that presented with fever and cough and was subsequently diagnosed with T-cell ALL. T-ALL was diagnosed on flow cytometry. Due to poor prognosis, the patient was assigned palliative care.

Practical implications: Management of infantile leukaemia has yet to be studied in-depth. With a lack of clear treatment guidelines, the approach toward these patients remains challenging. Further research and clinical trials in this area of study are paramount to improving clinical outcomes for these young patients.