title: Relationship between age, histological type, and size of ovarian tumors.
abstract: OBJECTIVE
  To clarify the relationship between age, histological type, and size of ovarian tumors.
  
  
  METHODS
  A review was made of 1648 cases of histopathologically diagnosed ovarian tumors and tumor-like lesions, and information on the age of the patients and size of the tumor was obtained. Statistical analysis was performed using Kruskal-Wallis tests or Mann-Whitney U-tests.
  
  
  RESULTS
  There were 840 (51%) cases of benign tumors, 73 (4%) cases of tumors of low malignant potential (LMP), 268 (16%) cases of malignant tumors and 467 (28%) cases of tumor-like lesions. The age of the patients was significantly different among tumor-like lesions (34.6+/-8.1 years), benign tumors (39.8+/-16.4 years), LMP tumors (45.2+/-18.3 years) and malignant tumors (51.9+/-13.0 years) (P<0.0001). The maximum diameter of the tumors was significantly different among tumor-like lesions (7.1+/-3.3 cm), benign tumors (10.9+/-5.6 cm), malignant tumors (13.6+/-6.5 cm) and LMP tumors (18.5+/-6.8 cm) (P<0.0001).
  
  
  CONCLUSIONS
  The distribution of tumor histological type (tumor-like lesions, benign, LMP and malignant) was correlated against patient age and lesion diameter, with tumors in older patients or larger tumors more likely to be malignant.
authors: Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. kokugawa@med.kyushu-u.ac.jp
authors: K
authors: K
authors: Okugawa
authors: T
authors: T
authors: Hirakawa
authors: K
authors: K
authors: Fukushima
authors: T
authors: T
authors: Kamura
authors: S
authors: S
authors: Amada
authors: H
authors: H
authors: Nakano
mesh_terms: D000328:Adult; D000367:Age Factors; D002277:Carcinoma / Q000473:pathology; D003537:Cystadenoma / Q000473:pathology; D004715:Endometriosis / Q000473:pathology; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008499:Medical Records; D008875:Middle Aged; D010048:Ovarian Cysts / Q000473:pathology; D010049:Ovarian Diseases / Q000453:epidemiology* / Q000209:etiology / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000473:pathology; D012189:Retrospective Studies