Table 3. Comparison of solitary, multiple keratocystic odontogenic tumours (KCOTs) and naevoid basal cell carcinoma syndrome (NBCCS).

Radiographic appearance	Area	Density mean	IOD
Solitary	79.0383 ± 18.9236	0.3787 ± 0.1086	37.5161 ± 16.2223
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

There was a significant difference in the expression of Ki-67 between the solitary KCOT and NBCCS groups (P = 0.018); however, no significant differences were observed between the solitary and multiple KCOT groups (P = 0.220). IOD, integrated optical density