Summarizing MCL treatment discontinuations are part of the primary study objective relating to treatment patterns and will be descriptive only. The rate of treatment discontinuation (in months) will be estimated using aggregated patient data. Reasons for discontinuations will be collected and summarized categorically. Summary statistics (mean, SD, median, IQR, minimum, and maximum) will be used to describe time on therapy, which will be measured from the start of treatment until the date of discontinuation or death.

Summarizing MCL treatment duration is part of the primary study objective relating to treatment patterns and will be descriptive only. The duration and number of cycles of each targeted treatment (mean, SD, median, IQR, minimum, and maximum) will be summarized. Summary statistics (mean, SD, median, IQR, minimum, and maximum) will be used to describe time on therapy (in months), which will be measured from the start of treatment until the date of discontinuation, interruption, switch or death.

ORR will be measured as the frequency and proportion of patients with a complete or partial response based on physician assessment during the observation period.

The CR will be calculated as the frequency and proportion of patients with a complete response based on physician assessment during the observation period.

All survival outcome measures will be descriptive only. PFS will be calculated as the time from the start of novel MCL treatment until progression or death. Summary statistics (mean, median, SD, IQR, minimum and maximum) will be used to describe PFS. Kaplan-Meier curves will be used to graphically show PFS.

All survival outcome measures will be descriptive only. EFS will be calculated as the time from the start of novel MCL treatment to disease progression, death, or discontinuation of treatment for any reason (eg, toxicity, patient preference, or initiation of a new treatment without documented progression).

All survival outcome measures will be descriptive only. OS will be captured using summary statistics (mean, SD, median, IQR, minimum and maximum), which will be used to describe time from diagnosis to death, time from enrollment to death, time from index novel MCL treatment to death and time from second treatment (if applicable) to death. Kaplan-Meier curves will be used to graphically show patient survival.

The proportion of patients with AEs will be calculated from the start of index novel MCL treatment. AEs (both in terms of the MedDRA Preferred Terms (PTs) and Common Terminology Criteria for Adverse Events [CTCAE] grade) will be listed individually by patient and described by System Organ Class (SOC) and PT.

The proportion and frequency patients with SAEs will be tabulated from the start of index novel MCL treatment.

The proportion and frequency of all SAEs and any AEs leading to treatment changes will be tabulated overall, and will also include the frequency and proportion of: (1) drug discontinuations, (2) dose interruptions or (3) dose changes.

The clinical events of interest that have an economic impact will be tabulated with the frequency and proportion of patients experiencing the event. Medical interventions used for managing clinical events of interest including but not limited to: diagnostic tests, procedures and medications.

Each type of physician visit will be tabulated at the aggregate level using the mean, SD, median, IQR, minimum and maximum. The total number of visits across all facilities will also be calculated.

Descriptive statistics for each validated PRO will include continuous measures (mean, median, SD, IQR, minimum, and maximum) or achievement of a particular threshold (frequency and proportion), if applicable. This study will collect patient perceptions of HRQoL based on PRO measures in patients with MCL by collecting the European Organization for Research and Treatment of Cancer, Quality of Life Questionnaire-Core 30 (EORTC QLQ-C30) on a quarterly basis. The EORTC QLQ-C30 has a recall/observation period during the past week. The questionnaire uses a 4-point Likert scale ranging from 1: "Not at all" to 4: "Very much," and scores by dimension range from 0 to 100.

Descriptive statistics for each validated PRO will include continuous measures (mean, median, SD, IQR, minimum, and maximum) or achievement of a particular threshold (frequency and proportion), if applicable. This study will collect patient perceptions of HRQoL by collecting the PRO version of the Common Terminology Criteria for Adverse Events (PRO-CTCAE) (3 questions regarding muscle pain, joint pain, heart palpitations) on a quarterly basis. The PRO-CTCAE is intended for individuals 18 years or older and has a recall of the past 7 days. Responses to each question are scored from 0 to 4 (in order of increasing frequency and severity).

Descriptive statistics for each validated PRO will include continuous measures (mean, median, SD, IQR, minimum, and maximum) or achievement of a particular threshold (frequency and proportion), if applicable. This study will collect patient perceptions of HRQoL based on PRO measures in patients with MCL by collecting the EQ-5D-5L on a quarterly basis. This questionnaire is comprised of 5 dimensions (mobility, self-care, usual activities, pain/discomfort and anxiety/depression) and 1 visual analog scale used to assess a patient's self-rated health. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. A unique health state is defined by combining 1 level from each of the 5 dimensions. Each health state is referred to in terms of a 5-digit code.