# Natural History Study of Monoclonal B Cell Lymphocytosis (MBL), Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (CLL/SLL), Lymphoplasmacytic Lymphoma (LPL)/Waldenstrom Macroglobulinemia (WM), and Splenic Marginal Zone Lymphoma (SMZL)

> **NCT00923507** · — · RECRUITING · sponsor: **National Heart, Lung, and Blood Institute (NHLBI)** · enrollment: 1000 (estimated)

## Conditions studied

- Waldenstrom Macroglobulinemia
- Lymphoplasmacytic Lymphoma
- Monoclonal B-Cell Lymphocytosis
- Small Lymphocytic Lymphoma
- CLL (Chronic Lymphocytic Leukemia)

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT00923507
- **Lead sponsor:** National Heart, Lung, and Blood Institute (NHLBI)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2008-05-29
- **Primary completion:** —
- **Final completion:** —
- **Target enrollment:** 1000 (ESTIMATED)
- **Last updated:** 2026-05-01


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00923507

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00923507, "Natural History Study of Monoclonal B Cell Lymphocytosis (MBL), Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (CLL/SLL), Lymphoplasmacytic Lymphoma (LPL)/Waldenstrom Macroglobulinemia (WM), and Splenic Marginal Zone Lymphoma (SMZL)". Retrieved via AI Analytics 2026-05-29 from https://api.ai-analytics.org/clinical/NCT00923507. Licensed CC0.

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