Carcinoid tumours are commonly found in which locations?

Carcinoid tumours are commonly found in which locations?

• A. Gastrointestinal tract and lungs
• B. Brain and spinal cord
• C. Skin
• D. Bones

Answer: (A)

Carcinoid tumours are neuroendocrine tumours that most often originate from hormone-producing cells in two areas: the gastrointestinal tract and the bronchial passages of the lungs. The GI tract has many enteroendocrine cells, and the lungs contain bronchial neuroendocrine cells, which is why these two sites are the most common origins. Within the GI tract, they’re especially frequent in the appendix and ileum, while in the lungs they arise in the bronchial mucosa. Other locations like the skin, bones, or brain/spinal cord are not typical primary sites for carcinoids (though metastases to other sites can occur). So the best answer is that they are commonly found in the gastrointestinal tract and the lungs.

Carcinoid tumours are neuroendocrine tumours that most often originate from hormone-producing cells in two areas: the gastrointestinal tract and the bronchial passages of the lungs. The GI tract has many enteroendocrine cells, and the lungs contain bronchial neuroendocrine cells, which is why these two sites are the most common origins. Within the GI tract, they’re especially frequent in the appendix and ileum, while in the lungs they arise in the bronchial mucosa. Other locations like the skin, bones, or brain/spinal cord are not typical primary sites for carcinoids (though metastases to other sites can occur). So the best answer is that they are commonly found in the gastrointestinal tract and the lungs.