ABSTRACT
INTRODUCTION AND IMPORTANCE: Gastric schwannoma is a rare and benign tumor originating from the peripheral nerves of the stomach. Despite its benign nature, this tumor typically remains asymptomatic for an extended period, and its radiological and endoscopic presentation poses challenges in distinguishing it from other gastric mesenchymal tumors. CASE PRESENTATION: Here, we present a rare case of a patient experiencing gastric pain and melena secondary to a gastric mass. The initial preoperative diagnosis indicated a gastrointestinal stromal tumor, but subsequent pathological and immunohistochemical staining of the surgical specimen confirmed the presence of gastric schwannoma. DISCUSSION: To gain insights into this uncommon condition, we conducted an electronic search on PubMed using the keywords "gastric schwannoma" and "gastric neurinoma." Our focus centered on case series containing more than five cases of gastric localization, resulting in the analysis of 14 case series involving a total of 321 patients. Our review aims to comprehensively discuss the clinical, radiological, and therapeutic aspects associated with this rare disease. CONCLUSION: In the absence of a definitive preoperative diagnosis, the surgical approach is considered the primary treatment for resectable gastric schwannoma, given its excellent long-term outcomes. However, further studies are imperative to better define the role of endoscopic resection in managing this condition.
ABSTRACT
INTRODUCTION AND IMPORTANCE: Extrahepatic metastasis is an exceptional site for rectal adenocarcinoma. Its clinical and radiological presentations are similar to those of cholangiocarcinoma, and its management requires collaboration between surgeons, endoscopists, and oncologists. CASE PRESENTATION: We present a unique case of a 58-year-old woman previously treated two and a half years ago for middle rectal adenocarcinoma with liver metastasis. In the immediate postoperative period, following restoring digestive continuity, she presented cholestatic jaundice from malignant obstruction of the extrahepatic bile duct. A midline laparotomy revealed a tumor of the common bile duct invading the hepatic pedicle. Therefore, external bile drainage, biopsy and hepatic lymph node dissection were performed. Immunohistochemical staining confirmed the diagnosis of extrahepatic bile duct metastasis from rectal adenocarcinoma. CLINICAL DISCUSSION: Extrahepatic bile duct metastasis from rectal adenocarcinoma manifests as bile duct stenosis or intraluminal lesions, and only pathological examination with immunochemical staining confirms the diagnosis. Radical treatment is possible when general conditions allow it. CONCLUSION: Our case is the twelfth to describe a solitary metastasis of the bile duct metastasis from colorectal adenocarcinoma. The rarity of published cases in the literature means that their development mechanism and management are not well-codified.
