Neuroendocrine cells are widespread throughout the body and can give rise of neuroendocrine tumors due to abnormal growth of the chromaffin cells. Neuroendocrine tumors divide into many subtypes based on tumor grade (Ki-67 index and mitotic count) and differentiation. These tumors can be further divided into secretory and nonsecretory types based on the production of peptide hormone by tumor cells. Poorly differentiated small-cell-type neuroendocrine tumors are one of the subtypes of neuroendocrine tumors. These tumors are less common; however, they tend to be locally invasive and aggressive in behavior with poor overall median survival. Treatment of the nonsecretory small-cell type is modeled to small-cell lung cancer with a regimen consisting of platinum-based chemotherapy and etoposide with variable response. Here, we present a case of poorly differentiated small-cell neuroendocrine tumor originating from the prostate.

The poorly differentiated small-cell type, neuroendocrine carcinoma (NEC) of the gallbladder is a very uncommon subtype of a neuroendocrine tumor of the gastrointestinal tract. Nonsecretory NEC by virtue of its nonspecific and subtle clinical presentation of the tumor is usually diagnosed at an advance stage with presenting symptoms related to either locally advance disease or from metastatic disease. Though the radiologic imaging does identify the gall bladder cancer, the tumor lacks a specific diagnostic test; therefore, the diagnosis is almost always confirmed on histopathologic and immunohistochemical staining. We present a case of a poorly differentiated, small-cell neuroendocrine tumor of the gallbladder. The patient died within 3 months after the definitive diagnosis was made. Survival from this deadly malignancy can be improved with aggressive surgical treatment followed by chemotherapy and radiotherapy on a case-by-case scenario. The systemic chemotherapy remained the treatment of choice for an unresectable tumor (Chen et al., 2014).

Splenic rupture following colonoscopy is rare, first reported in 1974, with incidence of 1–21/100,000. It is critical to anticipate splenic trauma during colonoscopy as one of the causes of abdominal pain after colonoscopy especially when located in the left upper quadrant or left shoulder. Postoperative adhesions is a predisposing factor for splenic injury, and management is either operative or nonoperative, based on hemodynamic stability and/or extravasation which can be seen on contrast-enhanced CT scan of the abdomen. We present a case of a splenic rupture after colonoscopy in a patient with splenocolic adhesions, requiring splenectomy as definite treatment.