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Predictive value of interpeduncular distance measurement in children
Insights
Measuring the interpeduncular distance (IPD) in children may not reliably detect intraspinal lesions. While a large IPD often indicates skeletal issues, it has limited value for diagnosing lumbar intraspinal abnormalities.
Area of Science:
- Pediatric Radiology
- Neuroradiology
- Spinal Imaging
Background:
- The interpeduncular distance (IPD) is a measurement used in spinal imaging.
- Its utility in diagnosing intraspinal lesions in children requires further evaluation.
Purpose of the Study:
- To assess the diagnostic value of interpeduncular distance (IPD) measurement for suspected intraspinal lesions in children.
Main Methods:
- A series of 55 children referred for myelography were evaluated.
- Interpeduncular distance (IPD) measurements were analyzed in relation to skeletal abnormalities and myelographic findings.
Main Results:
- An IPD exceeding +2 SD was strongly associated with skeletal abnormalities.
- Myelography revealed pathologic lesions in two-thirds of patients with skeletal abnormalities and large IPDs.
- Pathologic lesions were found in 2 of 6 patients with large IPDs but no skeletal malformations.
- Eight of 31 patients with normal IPD measurements had pathologic lesions.
Conclusions:
- Measurement of IPD may have limited value in investigating intraspinal changes in the lumbar region of children.
- Correlation between IPD and intraspinal pathology is not consistently high, especially in the absence of skeletal abnormalities.
Abstract:
The value of measurement of the interpeduncular distance (IPD) in the investigation of a suspected pathologic intraspinal lesion was assessed in a series of 55 children referred for myelography from a university department of paediatrics. An IPD exceeding +2 SD was almost always associated with skeletal abnormality. Myelography disclosed pathologic lesions in two-thirds of 14 such patients. When no skeletal malformation was present, a large IPD (i.e. exceeding +2 SD) was found as expected. Myelography disclosed pathologic lesions in 2 of 6 such patients. Among 31 patients with normal IPD measurements 8 had pathologic lesions. Measurement of IPD may be of little value in the investigation of intraspinal changes in the lumbar region in children.