Carcinoid syndrome caused by a pulmonary carcinoid mimics intestinal manifestations of ulcerative colitis: A case report

Figure 1  The initial chest roentgenogram showing an unclear visualization of the right hilar shadow suggestive of right lower lobe collapse with minimal right-sided pleural effusion.

Figure 2 Preoperative computed tomography scan. A and B: Mediastinal window during the phase of contrast shows a well-defined 43 mm × 56 mm round bordered intraluminal growth in the right bronchus intermedius occluding the airway; C and D: Lung window shows near complete collapse of the right middle lobe with no aeration post obstruction.

Figure 3 Surgical specimen. A: Macroscopic appearance of a solid, well-circumscribed intraluminal tumoral lesion in the right main stem bronchus; B and C: Representative images of tumor cells revealing round nuclei, granular chromatin and large eosinophilic cytoplasm (H&E); D: Immunohistochemistry showing positivity to chromogranin (Scale 1:100); E: The tumor demonstrates high synaptophysin expression.