Data collection
All T-ALL/T-LBL patients <18years of age who presented in our department with signs and symptoms of SVCS including cough, dyspnea, dysphagia and swelling or discoloration of the neck, face and upper extremity between 1st May 2016 and 31st March 2021 were included. Electronic medical records were used for retrospective analysis of the patients’ clinical records. The Picture Archiving and Communication System (PACS) software was used to retrieve radiological data. Clinical notes and telephonic communication were used to document follow up till 30th November 2021.