Table 2. Comparison of unilocular, multilocular, multiple keratocystic odontogenic tumours (KCOTs) and naevoid basal cell carcinoma syndrome (NBCCS).

Radiographic appearance	Area	Density mean	IOD
Unilocular	75.3533 ± 18.6387	0.4375 ± 0.0450	45.4875 ± 12.5480
Multilocular	83.0582 ± 19.2774	0.3145 ± 0.1227	28.8200 ± 15.6948
Multiple (excluding NBCCS)	90.0200 ± 14.1874	0.3600 ± 0.0354	33.2620 ± 5.2980
NBCCS	90.5200 ± 10.0778	0.5050 ± 0.0663	54.6650 ± 12.1198

The expression of Ki-67 in the multilocular group was significantly different from that in the unilocular and NBCCS groups (P = 0.000); moreover, there was a significant difference between the multiple and syndrome-associated groups (P = 0.002). IOD, integrated optical density