An epidemiological analysis of benign pelvic tumors:201 cases report

JIN Tao; LIU Wei-feng; DENG Zhi-ping; LI Yuan; NIU Xiao-hui

doi:10.3969/j.issn.2095-252X.2014.02.007

Abstract：Objective To deepen the understanding of benign pelvic tumors and to improve the level of diagnosis through analyzing the epidemiological and radiological features of benign pelvic tumors. Methods The data of 201 patients with benign pelvic tumors who were adopted in our department from July 1958 to October 2011 were reviewed. The age and gender of patients were recorded, and the age group in which pelvic tumors occurred frequently and the sex ratio were analyzed. The pathological data were reviewed to determine the pathological types of tumors. The radiological data were examined by 2 veteran bone tumor specialists to determine the anatomic sites and radiological features of tumors. Based on the data stated above, epidemiological features of all kinds of benign pelvic tumors were analyzed, with statistical analysis of gender, age, tumor types, positions and radiological features. Results There were 114 male patients and 87 female patients, and the ratio of males to females was 1.31:1;Age of onset was 5-72 years old, the median age was 28.0 years old, and the mean age was 30.1 years old. 58 patients were younger than 20 years old ( 28.86%), 52 patients were of 21-30 years old ( 25.87%), 54 patients were of 31-40 years old ( 26.87%), 21 patients were of 41-50 years old ( 10.45%) and 16 patients were older than 50 years old ( 7.96%). The common tumors were giant cell tumor of bone ( 59 cases ), osteochondroma ( 53 cases ), simple bone cyst ( 17 cases ), aneurysmal bone cyst ( 15 cases ), osteoifbrous dysplasia ( 14 cases ), and chondroblastoma ( 13 cases ). Tumors occurred frequently around the acetabulum. Giant cell tumors of bone and aneurysmal bone cysts were more invasive, and often involving multiple partitions. Conclusions The peak time for the incidence of benign pelvic tumors is younger than 40 years old, and the most frequent location is around the acetabulum. The understanding of the epidemiological and radiological features is helpful for early diagnosis and differential diagnosis of benign pelvic tumors.