Abstract:
BACKGROUND:To investigate the incidence of gastrointestinal stromal tumors (GISTs) in Taiwan and the impact of imatinib on the overall survival (OS) of GIST patients. METHODS:GISTs were identified from the Taiwan Cancer Registry (TCR) from 1998 to 2008. The age-adjusted incidence rates and the observed OS rates were calculated. Cox proportional hazards models were applied to examine the mortality risk in three time periods (1998-2001, 2002-2004, 2005-2008) according to the application and availability of imatinib. RESULTS:From 1998 to 2008, 2,986 GISTs were diagnosed in Taiwan. The incidence increased from 1.13 per 100,000 in 1998 to 1.97 per 100,000 in 2008. The most common sites were stomach (47-59%), small intestine (31-38%), and colon/rectum (6-9%). The 5-year observed OS was 66.5% (60.3% for men, 74.2% for women, P < .0001). GISTs in the stomach had a better 5-year observed OS (69.4%) than those in the small intestine (65.1%) (P < .0001). The outcome of GIST improved significantly after the more widespread use of imatinib; the 5-year observed OS increased from 58.9% during 1998-2001 to 70.2% during 2005-2008 (P < .0001). Younger age, female sex, stomach location, and later diagnostic years were independent predictors of a better survival. CONCLUSIONS:The incidence of GIST has been increasing in Taiwan, partially due to the advancement of diagnostic technology/method and the increased awareness by physicians. The outcome of GIST has improved significantly with the availability and the wider use of imatinib.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Chiang NJ,Chen LT,Tsai CR,Chang JSdoi
10.1186/1471-2407-14-102subject
Has Abstractpub_date
2014-02-18 00:00:00pages
102issn
1471-2407pii
1471-2407-14-102journal_volume
14pub_type
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