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Marked transient alkaline phosphatemia following pediatric liver transplantation
B Koneru1, E Carone, J J Malatack
1Department of Surgery, University of Pittsburgh, Pa.
Insights
Isolated high alkaline phosphatase in children post-liver transplant may not indicate serious issues. Close observation is recommended over invasive procedures for this transient abnormality.
Area of Science:
- Pediatric Hepatology
- Transplant Surgery
- Clinical Biochemistry
Background:
- Transient elevations in serum alkaline phosphatase (sALP) are common in healthy children.
- In pediatric liver transplant recipients, elevated sALP can suggest serious complications like biliary obstruction or rejection.
- Distinguishing benign sALP elevations from pathological causes is crucial for appropriate management.
Purpose of the Study:
- To investigate the significance of isolated, marked, transient rises in serum alkaline phosphatase in children following liver transplantation.
- To evaluate the incidence and clinical implications of this specific biochemical abnormality in a pediatric liver transplant cohort.
- To determine if such isolated sALP elevations warrant invasive diagnostic procedures or if conservative management is appropriate.
Main Methods:
- Retrospective analysis of pediatric liver transplant recipients over a 6-year period.
- Identification of patients with isolated, marked, transient increases in serum alkaline phosphatase.
- Clinical and biochemical follow-up to assess for rejection, biliary obstruction, or allograft dysfunction.
Main Results:
- Six out of 278 pediatric liver transplant recipients (2.2%) presented with isolated, marked, transient sALP elevations.
- None of these patients experienced rejection, biliary obstruction, or other signs of allograft dysfunction during extended follow-up.
- Serum alkaline phosphatase levels normalized spontaneously without any specific intervention in all identified cases.
Conclusions:
- Isolated, marked, transient elevations in serum alkaline phosphatase in pediatric liver transplant recipients may be a benign phenomenon.
- Caution is advised against immediate invasive procedures when elevated sALP is the sole abnormality.
- Close clinical observation and noninvasive testing are recommended as the initial approach for managing such cases.
Abstract:
An isolated marked transient rise in serum alkaline phosphatase levels in otherwise healthy children is a well-documented occurrence. However, in children undergoing liver transplantation, elevated alkaline phosphatase values raise the possibility of biliary obstruction, rejection, or both. During a 6-year period, 6 of 278 children undergoing liver transplantation exhibited a similar phenomenon as an isolated abnormality. None had rejection, biliary obstruction, or other allograft dysfunction during a long follow-up. Eventually and without intervention, the alkaline phosphatase levels returned to normal. These instructive cases suggest that caution be used in advocating invasive procedures if elevated alkaline phosphatase levels are an isolated abnormality, and close observation with noninvasive testing is recommended.