RT Journal Article SR Electronic T1 Carcinoid tumors: What should increase our suspicion? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 849 OP 855 DO 10.3949/ccjm.75a.08002 VO 75 IS 12 A1 Aggarwal, Gaurav A1 Obideen, Kamil A1 Wehbi, Mohammad YR 2008 UL http://www.ccjm.org/content/75/12/849.abstract AB Carcinoid tumors are neuroendocrine neoplasms, primarily of the gastrointestinal tract. Their incidence has been increasing over the last 2 to 3 decades. Patients often present with vague, nonspecific symptoms. Thus, primary care physicians should keep this diagnosis in mind and start appropriate diagnostic testing if they suspect it on a clinical basis. Patients with carcinoid tumors are also at increased risk of developing other malignancies, so close follow-up by their primary care physician is necessary.