BACKGROUND Carcinoid tumors rarely arise in the extrahepatic bile duct and can be difficult to distinguish from carcinoma. There are no reports of clear cell carcinoid (CCC) tumors in the distal bile duct (DBD) to the best of our knowledge. Herein, we report a CCC tumor in the DBD and review the literature concerning extrahepatic bile duct carcinoid tumors. CASE PRESENTATION A 73-old man pres...

Sporadic gastric carcinoid tumors are relatively infrequent malignancies of the stomach. Tumors measuring less than 1 cm can sometimes be safely removed endoscopically; however, larger neoplasias require surgical ablation. The present case report represents a gastric carcinoid tumor laparoscopically resected in a patient with a history of hematemesis. The tumor was first marked endoscopically w...

INTRODUCTION Endometriosis is occasionally found in the appendix, particularly in severe forms of deep infiltrating disease. Carcinoid tumor is the most common neoplasm of the appendix and may be overlooked or misdiagnosed when there are multiple endometriosis lesions in the pelvis. CASE DESCRIPTION We describe two cases of carcinoid tumor diagnosed in patients who underwent surgery to treat ...

A 41-year-old woman was referred with epigastric discomfort. She had a 20-year history of SLE. Esophagogastroduodenoscopy (EGD) examination showed severe atrophic gastritis in the stomach and a protruding lesion was detected. Histological examination showed a carcinoid tumor with cytoplasmic staining with chromogranin-A. Using an endoscopic submucosal dissection (ESD) technique, en bloc resecti...

Thymic carcinoid tumors very rarely occur during childhood and are often associated with the production of adrenocorticotropic hormone (ACTH), which leads to Cushing’s syndrome. We describe a 7-year-old male patient with a thymic atypical carcinoid tumor who presented with cyclical Cushing’s syndrome. His tumor was initially overlooked on computed tomography scanning in the anterior mediastinum...

BACKGROUND Intrapulmonary carcinoid tumors (ICTs) are malignant, slow-growing tumors classified as either: i) typical, less aggressive, well-differentiated tumors or ii) atypical, more aggressive, poorly-differentiated tumors. Most typical carcinoid tumors originate in the central airway and present with symptoms related to bronchial obstruction. In contrast, atypical carcinoids tend to occur m...

BACKGROUND Malignant transformation of mature cystic teratoma is a rare complication. While any of the constituent tissues of a teratoma has the potential to undergo malignant transformation, squamous cell carcinoma is the most commonly associated malignancy. Renal carcinoid tumors are rare and frequently associated with horseshoe kidney and renal teratoma. Renal teratoma rarely presents togeth...

BACKGROUND Since Oberndorfer proposed the term "carcinoid" in 1907, over 100 years have passed. This attractive term was initially proposed for 6 cases of his own experience with 12 submucosal lesions in the small intestine.Oberndorfer summarized the characteristic features of these lesions as follows: (1) small in size and often multiple, (2) histologically undifferentiated with a suggestion o...

BACKGROUND We evaluated the discriminating capacity of the indole markers urinary 5-hydroxyindoleacetic acid (5-HIAA), urinary serotonin, and platelet serotonin in the diagnosis of carcinoid tumors. METHODS Indole markers were measured in 688 patients with suspected carcinoid disease. The initial values of indole markers from patients in whom a carcinoid tumor was confirmed during follow-up (...

Endobronchial carcinoid tumors are the most common intrabronchial tumors in children and adolescents. Common signs and symptoms include persistent cough and wheezing not responsive to bronchodilators, hemoptysis, and recurrent fever. Diagnosis is frequently made by imaging and direct visualization with flexible bronchoscopy; surgery remains the gold standard treatment, and lung-sparing resectio...