Table 1 Studies of the natural progression of gallblader polyps during follow up of patients and/or subjects
From: Ultrasonographically detected gallbladder polyps: A reason for concern? A seven-year follow-up study
Author Year | Country | Population | n | Method | Follow-up Period | Patients undergoing surgery | Changes in polyp diameter during the observation period | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
N | Reduction | Disappearance | Increase | Unchanged | |||||||
Eelkema 1962 | USA | Patients | 113 | Cholecystography | 15 years | ||||||
Moriguchi 1996 | Japan | Outpatients | 109 | Ultrasound | 5 years | 4 | No carcinoma | 1.9% | 1.9% | 11.7% | 84.5% |
Shinkai 1988 | Japan | Patients | 60 | Ultrasound | Average 22 months | 9 | No carcinoma | No statistically significant change | No statistically significant change | No statistically significant change | No statistically significant change |
Heyder 1990 | Germany | Patients: abdominal screening in a surgical population | 92 | Ultrasound | Average 9 months | 2 | No carcinoma | No data | 13% | 6,5% | No data |
Collett 1998 | New Zealand | Diabetics and healthy controls | 564 | Ultrasound | 2 years – 30 patients 5 years – 22 patients | 0 | No surgery | No data | No data | No data | No data |
Sugiyama 2000 | Japan | Surgical patients | 125 | Ultrasound/Endo-ultrasound | Average 2.6 years | 3 | No carcinoma | 4% | 1.6% | 7.2% | 87.2% |
Csendes 2001 | Chile | Surgical patients with dyspeptic symptoms or routine examination | 98 | Ultrasound | Average 5.9 years Range 24–144 months | 14 | No carcinoma | 2%1/2 7% | 18%1/210% | 5% 3 | 53%1/2 72% |