目的：探讨小于胎龄儿脑岛发育的状况。方法：通过颅脑超声测量92例小于胎龄儿脑岛面积、周长，并与109例同胎龄正常适于胎龄儿相比较。结果：小于胎龄儿脑岛面积、周长与出生体重、胎龄呈正相关；小于胎龄儿脑岛面积（＞37周：451±92 mm2;≤34周：248±78 mm2）、周长（＞37周：92±11 mm）与正常同胎龄适于胎龄儿脑岛面积（＞37周：516±116 mm2;≤34周：314±80 mm2）、周长（＞37周：97±11 mm）比较，差异有显著性意义（P<0.05）。结论：小于胎龄儿脑岛发育成熟欠佳；脑岛的发育可通过颅脑超声测量新生儿脑岛面积、周长予以评价。［中国当代儿科杂志，2009，11（9）：733-735］

OBJECTIVE: To study the insular development of small for gestational age (SGA) infants. METHODS: The insular area and circle were measured by cerebral ultrasonography in 92 SGA infants. The results were compared with those from 109 appropriate for gestational age (AGA) infants. RESULTS: The insular area and circle were positively correlated with the birth weight and gestational age in SGA infants. The insular area in SGA infants with a gestational age of either >37 weeks (451±92 mm2 vs 516±116 mm2; P37 weeks was also significantly less than that in the AGA infants (92±11 mm vs 97±11 mm; P<0.05). CONCLUSIONS: The insular development of SGA infants seems to be immature. The insular development may be assessed based on the insular area and circle measured by cerebral ultrasonography.［Chin J Contemp Pediatr, 2009, 11 (9):733-735］