Mucociliary transport using 99mTc-albumin colloid: a reliable screening test for primary ciliary dyskinesia.
BACKGROUND
A study was undertaken to assess the reliability of the nasal mucociliary transport test using 99mTc-albumin colloid as a screening test for primary ciliary dyskinesia (PCD) and to compare it with the gold standard nasal biopsy for study of ciliary motility and ultrastructure.


METHODS
During a 4 year period both tests were performed in 55 children referred with persistent or recurrent respiratory tract infections. Their median age was 4 years (range 1 month to 15 years).


RESULTS
The nasal biopsy results were as follows: PCD, n = 8; secondary ciliary dyskinesia (SCD), n = 19; normal, n = 28. The mucociliary transport test was abnormal in 29 patients (all 8 with PCD, 7/19 with SCD, and 14/28 with a normal biopsy). The sensitivity of the mucociliary transport test to diagnose PCD was therefore 100% (8/8) (95% exact confidence limits 63.06 to 100.00); the specificity was only 55% (26/47) (40.95 to 69.89). The negative predictive value was 100% (26/26) (86.77 to 100.00) and the positive predictive value was 28% (8/29) (12.37 to 47.24).


CONCLUSIONS
Mucociliary transport is a non-invasive screening test that can be performed even in infants. The sensitivity of the test is high but its specificity is low. A normal test result excludes PCD.
De Boeck
K
K
Department of Pediatrics, University of Leuven, Belgium. christiane.deboeck@uz.kuleuven.ac.be
Proesmans
M
M
Mortelmans
L
L
Van Billoen
B
B
Willems
T
T
Jorissen
M
M
D000293:Adolescent; D001706:Biopsy; D002648:Child; D002675:Child, Preschool; D002925:Ciliary Motility Disorders / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007223:Infant; D009079:Mucociliary Clearance / Q000502:physiology*; D009666:Nose / Q000473:pathology; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric; D013668:Technetium Tc 99m Aggregated Albumin
D019275:Radiopharmaceuticals; D013668:Technetium Tc 99m Aggregated Albumin