NQPC-06 FUNCTIONAL OUTCOMES OF INITIAL TREATMENTS FOR PATIENTS WITH PRIMARY CENTRAL NERVOUS SYSTEM LYMPHOMA ASSESSED BY ADL AND NEUROCOGNITIVE FUNCTION

BACKGROUNDS: Primary central nervous system lymphoma (PCNSL) frequently causes severe damage of activities of daily living (ADL) and neurocognitive function (NCF) due to extensive brain infiltration, necessitating their appropriate assessment and measures even in clinical practice. Since few studies have focused on the changes in the level of ADL and NCF in the course of PCNSL treatment, we retrospectively analyzed the effect of initial treatment of PCNSL in view of ADL and NCF. METHODS: Among 55 patients (13 male/9 female) with newly-diagnosed PCNSL treated in our institution from January 2014 to June 2019, 22 were evaluated with both ADL and NCF. Remission induction therapies consisted of high-dose methotrexate alone (two patients), R-MPV (rituximab, methotrexate, procarbazine, and vincristine)(17 patients), and R-MPV+radiaotherapy (three patients), according to the patients’ conditions. Rehabilitation staffs intervened from the beginning, providing specific exercises and periodically evaluating scores of Karnofsky Performance Status (KPS) and Mini Mental State Examination (MMSE). RESULTS: Mean age was 68.4 yo (range 34 to 85). After induction therapies, there were 11 complete responses (CRs), eight partial responses (PRs), and three progressive diseases (PDs). Both KPS and MMSE scores improved after induction therapy, from median 70 (40–90) to 80 (50–90), and from 24 (0–30) to 27(0–30), respectively. Among three patients who underwent RT, MMSE declined in two (one CR/one PR). CONCLUSIONS: Case-adjusted induction therapies resulted in significant radiographical responses, and the longitudinal evaluation of ADL and NCF by rehabilitation staffs could validate their maintenance or improvement over time through effective treatments and early rehabilitation intervention. However, three was difficulty in assessing patients with higher brain dysfunction such as aphasia and social adjustment disorder. Further study is needed to include more patients and to explore more appropriate evaluation batteries and timings during and after completion of induction therapy for PCNSL.