Demographic data
A total of 44 patients were included in the study. There were 36 male patients and 8 female patients with a ratio of 5:1 (Figure 1). The mean age of males with IPs was 60 (range,18 to 72 years) and the mean age for females was 56 (range, 41 to 68). There were 27 (61.4%) Malay patients, 10 (22.7%) Chinese patients, 5 (11.4%) Indian patients and the remaining 2 (4.5%) patients were of other races (Figure 2).