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| Sonographic Measurement of Thymic Size in Healthy Korean Neonates |
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| Hyun Joo Seo, M.D., Dae Young Yoon, M.D., Dae Hee Han, M., Sang Wook Han, M., Ho Chul Kim, M.D., Young Mook Kim, M.D., Chul Soon Choi, M.D., Sang Hoon Bae, M.D. |
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| Department of Radiology, Hallym University College of Medicine |
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| PURPOSE : To assess the variation in thymic size in healthy Korean neonates by sonography and to study the possible
correlation to clinical variables.
MATERIALS and METHODS : This study was made of 112 healthy Korean neonates (94 full-term and 18 preterm), at
less than a week of age. The transverse diameter of the thymus was measured in a transverse scan and the largest
sagittal area was assessed in a longitudinal scan. The thymic index was defined as the product of these two values.
Then, this index was compared to clinical variables, such as sex, delivery method (spontaneous delivery vs
cesarian section), body weight, height, body surface area, head circumference, chest circumference, gestational
age, and maternal age in both full-term and preterm groups.
RESULTS : The thymic index was 9.6±3.1 (range 3.1-20.2) in full-term and 4.2±2.4 (range 0.9-9.9) in preterm
neonates, respectively. The thymic index was positively correlated to the body weight (R=0.550 in full-term,
R=0.669 in preterm) and body surface area (R=0.549 in full-term, R=0.674 in preterm) in both full-term and
preterm groups (p < 0.01). There was no statistically significant correlation to sex, delivery method, height, head
circumference, chest circumference, maternal age or gestational age.
CONCLUSION : The thymic index in healthy Korean neonates as measured by sonography is significantly correlated
to the body weight and body surface area of the neonate. |
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| Keyword : Thymus, US; Infants, newborn |
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pdf파일 : K20200071.pdf 
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> Journal > Journal Search 
Journal of Korean Society of Ultrasound in Medicine 2001 ; 20 (1) : p.71 - 75
