# Natural History Study of Progressive Multifocal Leukoencephalopathy (PML)

> **NCT01730131** · — · RECRUITING · sponsor: **National Institute of Neurological Disorders and Stroke (NINDS)** · enrollment: 700 (estimated)

## Conditions studied

- Progressive Multifocal Leukoencephalopathy

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT01730131
- **Lead sponsor:** National Institute of Neurological Disorders and Stroke (NINDS)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2012-11-08
- **Primary completion:** 2052-01-01
- **Final completion:** —
- **Target enrollment:** 700 (ESTIMATED)
- **Last updated:** 2026-05-05


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01730131

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01730131, "Natural History Study of Progressive Multifocal Leukoencephalopathy (PML)". Retrieved via AI Analytics 2026-09-03 from https://api.ai-analytics.org/clinical/NCT01730131. Licensed CC0.

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