The purpose of this study is to describe the main clinical characteristics of patients with de novo acute lymphoblastic leukemia treated inside the third level hospitals converted to Coronavirus disease 2019 (COVID-19) attention for the metropolitan area of Mexico City.

Retrospective, observational study in patients with diagnosis of acute lymphoblastic leukemia, according to the criteria of the World Health Organization, from April 2020 to December 2020. Patients was cared for in the hematology department of the Hospital Regional de Alta Especialidad de Ixtapaluca or the Hospital General de México. Both hospitals have been assigned as Coronavirus disease 2019 (COVID-19) hospitals, limiting the access, number of outpatient visits and chemotherapy protocols.

Real-time polymerase chain reaction (RT-PCR) test for Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was performed for patients with respiratory symptoms or history of contact with suspected / confirmed cases of COVID-19 Upon having a positive RT-PCR test, patients were transferred to a respiratory isolation unit to continue their recovery. Support treatment for COVID-19 was based on local considerations.

Inclusion Criteria:

• Patients with diagnosis of acute lymphoblastic leukemia according to the criteria of the World Health Organization.

Exclusion Criteria:

• Age less than 18 years
• Incomplete medical records

Patients with first diagnosis of acute lymphoblastic leukemia