Chemotherapy-induced peripheral neurotoxicity (CIPN) is a major toxicity of cancer treatment, leading to dose reduction and premature treatment cessation, potentially affecting patient function, and quality of life. The development of accurate and sensitive assessment tools for CIPN is essential to enable clinical monitoring during treatment, follow-up of long-term outcomes and measurement of toxicity in clinical trials.This review examines CIPN clinical assessment scales incorporating clinician-based, composite, and patient-reported outcomes (PROs), providing a systematic review of their properties and an updated critical analysis of recommendations on current evidence for their use. This systematic review of CIPN assessment tools identified 50 papers containing 41 assessment tools, across 4 categories (common toxicity criteria; composite neurological scale; PROs; pain scale). The majority of these tools were PROs, underscoring the importance of patient-based assessment of symptoms.While there has been considerable work in the field over the past 10 years, this review highlights significant gaps, including a lack of evaluation of responsiveness and problematic neuropathic pain evaluation. There remains a need for consensus on the best available tool and the need to modify existing instruments to improve utility. K E Y W O R D S assessment, chemotherapy, CIPN, neuropathy, neurotoxicity, outcome measures 1 | INTRODUCTION Chemotherapy-induced peripheral neurotoxicity (CIPN) is a prominent adverse event of cancer treatment, leading to dose reduction and premature treatment cessation, potentially affecting patient function and quality of life. The development of accurate and sensitive assessment tools for CIPN is essential to enable clinical monitoring during treatment, follow-up of long-term outcomes and measurement of toxicity in clinical trials. As with all treatment toxicities, a balanced approach between patient report, objective examination and clinician discretion is warranted. It is likely that tailored assessment strategies will be required to facilitate appropriate assessment in different contexts ranging from routine clinical screening tools to comprehensive multimodal assessments and outcome measures in clinical trials. Assessment tools which do not require specialised equipment are most accessible for routine clinical use. While common toxicity criteria (CTC) are the most commonly utilised assessment tools for a range of cancer treatment toxicities including CIPN, validated patient-reported outcome (PRO) measures provide sensitive assessment of neuropathy symptoms and significance for the patient. Composite neurological assessments containing a combination of symptom report and neurological examination findings provide another method of CIPN evaluation. Given the importance of selecting appropriate outcome measures, including in drug development and for regulatory approval, review of the properties of CIPN assessment tools is warranted.From this search, a total of 50 papers meeting inclusion criteria wer...