Table 3

Type of CO

Type of CO*FrequencyReference
Unilateral CO32 (27.4%)3 (two cases), 4 (four cases), 5,8,14,17,19,21,23,28 (two cases), 31,35,37,39 (two cases), 41,44,52,60,61,62 (four cases), 65,66 (two cases)
Bilateral CO62 (53%)3,4 (six cases), 7,10,11 (two cases), 12,13,15 (two cases), 16 (two cases), 18,19 (three cases), 20–22,24,25,26 (two cases), 27,28, (two cases), 30,32,36 (three cases), 38,39 (two cases), 40,42–44,47,48,49,50,51,52 (two cases), 56,57,58 (three cases), 59,60,63,64,67–69,
Absent14 (12%)4,9,16,33,34,41,45 (three cases), 50,53,55,62 (two cases)
Unstated9 (7.7%)16,29,32,45, (four cases), 46,54