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Risk of Thyroid Cancer Among Solid Organ Transplant Recipients
Author(s) -
Kitahara C. M.,
Yanik E. L.,
Ladenson P. W.,
Hernandez B. Y.,
Lynch C. F.,
Pawlish K. S.,
Engels E. A.
Publication year - 2017
Publication title -
american journal of transplantation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 188
eISSN - 1600-6143
pISSN - 1600-6135
DOI - 10.1111/ajt.14310
Subject(s) - medicine , thyroid cancer , transplantation , hazard ratio , population , dialysis , incidence (geometry) , kidney transplantation , cancer , liver transplantation , gastroenterology , confidence interval , physics , environmental health , optics
Solid organ transplant recipients have an elevated incidence of thyroid cancer. We evaluated a wide range of potential risk factors in a cohort of 229 300 U.S. solid organ transplant recipients linked with 15 stage/regional cancer registries (1987–2012). Incidence rate ratios ( IRR s) were adjusted for age, sex, race/ethnicity, transplanted organ, year of transplantation, and time since transplantation. Hazard ratios ( HR s) for death and/or graft failure were adjusted for age, sex, race/ethnicity, transplanted organ, and year of transplantation. After transplantation, 356 thyroid cancers were diagnosed. Thyroid cancer incidence was 2.50‐fold higher in transplant recipients than the general population (95% confidence interval [CI] 2.25–2.77). Among recipients of different organs, kidney recipients had the highest incidence of thyroid cancer ( IRR = 1.26, 95% CI 1.03–1.53). Elevated thyroid cancer incidence was associated with cholestatic liver disease/cirrhosis as an indication for liver transplantation ( IRR = 1.69, 95% CI 1.09–2.63), hypertensive nephrosclerosis as an indication for kidney transplantation ( IRR = 1.41, 95% CI 1.03–1.94), and longer prior dialysis among kidney recipients (5+ vs. <1 year, IRR = 1.92, 95% CI 1.32–2.80; p‐trend <0.01). Posttransplantation diagnosis of thyroid cancer was associated with modestly increased risk of death ( HR = 1.33, 95% CI 1.02–1.73). Overall, our results suggest that end‐stage organ disease and longer duration of dialysis may contribute to higher thyroid cancer incidence in transplant recipients.

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