instruction: how many days have there been since patient 57050's last sec mal neo brain/spine diagnosis during this hospital encounter?
response: SELECT 1 * (STRFTIME('%j', CURRENT_TIME()) - STRFTIME('%j', diagnoses_icd.charttime)) FROM diagnoses_icd WHERE diagnoses_icd.icd9_code = (SELECT d_icd_diagnoses.icd9_code FROM d_icd_diagnoses WHERE d_icd_diagnoses.short_title = 'sec mal neo brain/spine') AND diagnoses_icd.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 57050 AND admissions.dischtime IS NULL) ORDER BY diagnoses_icd.charttime DESC LIMIT 1