Fujiwara F, Fujikura K, Okuhara K, Tsubaki J, Fukushi M, Fujita K, Fujieda K, Tajima T. Central Congenital Hypothyroidism Detected by Neonatal Screening in Sapporo, Japan (2000-2004): It's Prevalence and Clinical Characteristics.
Clin Pediatr Endocrinol 2008;
17:65-9. [PMID:
24790365 PMCID:
PMC4004856 DOI:
10.1297/cpe.17.65]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2007] [Accepted: 03/31/2008] [Indexed: 11/25/2022] Open
Abstract
In Sapporo, Japan, a neonatal screening program for congenital hypothyroidism
(CH) has employed measurement of free thyroxine (T4) and TSH in the same filter-paper
blood spot. This system has enabled us to identify primary CH and central CH during the
neonatal period. The aim of this study was to clarify the prevalence and clinical
characteristics of central CH. For this purpose, the screening program requested serum
from infants with free T4 concentrations below the cut off value regardless of the TSH
levels. Between January 2000 and December 2004, 83,232 newborns were screened and six
central CH patients were detected as a result of follow-up of low free T4 and non-elevated
TSH screening (1:13,872). This frequency is higher than in other studies. Four patients
showed multiple pituitary hormone deficiency with pituitary malformations on magnetic
resonance imaging. One patient was diagnosed as having Prader-Willie syndrome. The
remaining patient was considered to have isolated central CH. Our study demonstrated that
the frequency of central CH is 1:13,872. Free T4 measurement would also be advantageous in
early recognition of multiple pituitary hormone deficiency.
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