A case series of 72 neonates with renal vein thrombosis

Stefan Kuhle; Patti Massicotte; Anthony Chan; Lesley Mitchell

doi:10.1160/TH04-02-0131

Thrombosis and Haemostasis, Table of Contents

Thromb Haemost 2004; 92(04): 929-933
DOI: 10.1160/TH04-02-0131

Theme Issue Article

Schattauer GmbH

A case series of 72 neonates with renal vein thrombosis

Data from the 1-800-NO-CLOTS Registry

Stefan Kuhle

¹Department of Population Health Sciences, The Hospital for Sick Children, Toronto, Canada

²Department of Neonatology, University Children’s Hospital, Tübingen, Germany

,

Patti Massicotte

³Division of Haematology and Oncology, The Hospital for Sick Children, Toronto, Canada

,

Anthony Chan

⁴Department of Paediatrics, McMaster University, Hamilton, Canada

,

Lesley Mitchell

¹Department of Population Health Sciences, The Hospital for Sick Children, Toronto, Canada

› Author Affiliations

Abstract

Summary

Neonatal renal vein thrombosis (RVT) is a well-recognized clinical entity which is associated with serious morbidity. However, current information regarding RVT has been restricted to case reports and small case series. In this study, it was our objective to describe patient demographics, clinical presentation, location and risk factors of RVT. For our study design, we looked at a case series of 72 neonates with RVT referred to the 1-800-NO-CLOTS consultation service between 9/1996 and 8/2001. Data on age, gender, associated conditions, prothrombotic disorders, family history, location of the thrombosis, diagnostic techniques, and treatment were prospectively recorded using a standardized form. Our results show that RVT affected males (65%, CI 52-76%) significantly more often than females (35%, CI 24-48%). Median age at presentation was 2 days (0-21 days). RVT was unilateral in 72% (left side: 67%, CI 49-81%; right side: 33%, CI 19-51%), and bilateral in 28%. The majority (83%) had at least one associated condition: Prematurity (54%), central venous lines (17%), a diabetic mother (13%), asphyxia (6%), infections (6%). Prothrombotic testing was performed in 21 neonates. Activated protein C resistance was found in 8 children (38%), other defects in three. This is the largest case series of neonatal RVT to date. Data from the study show that i) male infants are affected twice as often as females and ii) there appears to be a left-sided predominance of neonatal RVT. Neonatal RVT is only infrequently associated with the presence of a catheter as compared to thrombosis at other sites. The majority of infants have associated conditions with prematurity being most frequent. A small subset of neonates were screened for prothrombotic abnormalities and 50% of the children screened were positive.

Keywords

Clinical/epidemiological studies - neonates - thrombosis

Full Text

References

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