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Serum macromolecular creatine kinase type 1 as a diagnostic clue in inflammatory bowel disease?
K Martin Hoffmann1, Marlene Grillitsch, Andrea Deutschmann
1Division of General Pediatrics, Department of Pediatrics and Adolescent Medicine, Medical University Graz, Auenbruggerplatz 34/2, 8036 Graz, Austria. hoffmaka@mac.com
Insights
Elevated creatine kinase (CK) in pediatric inflammatory bowel disease (IBD) may indicate macro-creatine kinase (macro-CK) type 1, potentially aiding in diagnosing ulcerative colitis (UC) over Crohn
Area of Science:
- Pediatric Gastroenterology
- Clinical Biochemistry
- Diagnostic Biomarkers
Background:
- Macromolecular creatine kinase (CK) type 1 is associated with ulcerative colitis (UC) in adults, but not Crohn's disease (CD).
- Elevated CK levels can be a diagnostic challenge in pediatric inflammatory bowel disease (IBD).
Observation:
- Two pediatric patients with IBD presented with persistent, unexplained CK elevation.
- Diagnostic workup, including CK gel electrophoresis, identified macro-creatine kinase (macro-CK) type 1 in both cases.
- Subsequent clinical reevaluation, including endoscopy and histology, led to a revised diagnosis of UC.
Findings:
- Macro-CK type 1 formation may be linked to UC in pediatric IBD patients.
- This finding suggests macro-CK type 1 could serve as a potential biomarker to differentiate UC from CD in specific pediatric cases.
- Persistent CK elevation warrants further investigation for macro-CK type 1 in pediatric IBD.
Implications:
- Macro-CK type 1 identification may refine diagnostic accuracy for pediatric IBD, distinguishing between UC and CD.
- This research highlights the utility of biochemical analysis in complex pediatric gastrointestinal diagnoses.
- Further studies are needed to confirm the prevalence and diagnostic value of macro-CK type 1 in pediatric IBD.
Abstract:
In adults, macromolecular creatine kinase (CK) type 1 has been linked to ulcerative colitis (UC), but not to Crohn's disease (CD). We present two patients with pediatric inflammatory bowel disease (IBD) in which macrocreatine kinase (macro-CK) type 1 led to the final diagnosis of UC. A 13 year old with bloody diarrhea and weight loss was diagnosed with CD. CK elevation was interpreted as perimyocarditis attributed to CD. CK elevation persisted; however, cardiac evaluation remained unremarkable. CK gel electrophoresis revealed macro-CK type 1. During a disease flare-up and reevaluation (endoscopy and histology), the diagnosis was changed to UC. A 12-year-old girl with bloody diarrhea, weight loss, and anemia was diagnosed with CD (patchy distal colitis and aphtoid lesions). Repeated CK elevation was observed. Gel electrophoresis confirmed macro-CK type 1. After reevaluation during a flare-up (endoscopy and histology), the diagnosis was changed to UC. Conclusion CK elevation in pediatric IBD could suggest macro-CK type 1 formation, which is possibly linked to UC. In a subset of IBD patients, macro-CK type 1 could help differentiate UC from CD.
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