PMC1781446_01
Radiological examination for bone showing absence of epiphysis at the lower end of femur and upper end of tibia in Twin A.
1471-2431-7-2-1.jpg
PMC1781446_01_1471-2431-7-2-1.jpg
F1
Twin B (Figure 1, 2). The epiphysis at the lower end of femur appears normally between 31 and 40 weeks and for the upper end of tibia between 34 weeks and 5 postnatal weeks. Thus, Twin A had a bone age of less than 31 weeks and Twin B had a bone age of at least 34 weeks.
Radiological examination for bone showing epiphysis at the lower end of femur and upper end of tibia in Twin B.
1471-2431-7-2-2.jpg
PMC1781446_01_1471-2431-7-2-2.jpg
F2
Twin B (Figure 1, 2). The epiphysis at the lower end of femur appears normally between 31 and 40 weeks and for the upper end of tibia between 34 weeks and 5 postnatal weeks. Thus, Twin A had a bone age of less than 31 weeks and Twin B had a bone age of at least 34 weeks.
X-ray chest with mandible showed absence of calcified crowns of the first and second deciduous molar in Twin A.
1471-2431-7-2-3.jpg
PMC1781446_01_1471-2431-7-2-3.jpg
F3
Twin B (Figure 3, 4). The crowns of the first and second molars are never seen prior to 33 and 36 weeks respectively and are invariably seen after that. This suggests that twin A was at less 33 weeks and twin B was at least 36 weeks old.
X-ray chest with mandible showed calcified crowns of the first and second deciduous molar in Twin B.
1471-2431-7-2-4.jpg
PMC1781446_01_1471-2431-7-2-4.jpg
F4
Twin B (Figure 3, 4). The crowns of the first and second molars are never seen prior to 33 and 36 weeks respectively and are invariably seen after that. This suggests that twin A was at less 33 weeks and twin B was at least 36 weeks old.