Surgical Case Reports

Robot-Assisted Gastrectomy and Sigmoid Colectomy with Situs Inversus Totalis: A Case Report

Midori Hara, et al.

INTRODUCTION: Situs inversus totalis is a rare congenital disorder defined as mirror-image transposition of the thoracoabdominal organs, and surgical strategies remain controversial owing to the associated anatomical abnormalities. Although laparoscopic and robot-assisted surgeries are gaining popularity, no reports have been published on robot-assisted gastrectomy and sigmoid colectomy for situs inversus totalis at the same time.

Read full article >

A Case Report of Intradiaphragmatic Abscess

Yuuki Matsui, et al.

INTRODUCTION: Intradiaphragmatic abscesses are extremely rare; therefore, making a correct preoperative diagnosis is difficult. Furthermore, their pathogenesis is not well understood because of the limited number of reported cases.

Read full article >

A Case of Colon Leiomyosarcoma Arising from the Muscularis Mucosae: A Case Report and Literature Review

Yuta Kasagi et al.

INTRODUCTION: Colon leiomyosarcoma (CLMS) is an extremely rare neoplasm and the information regarding its clinical characteristics and specific treatment was still unclear.

Read full article >

Successful Treatment of Obstructive Pneumonia with Hemoptysis due to Non-Absorbable Suture-Related Granulation

Yukitaka Sato et al.

INTRODUCTION: Non-absorbable sutures or Teflon pledgets (model number: 00801741041341, Bard, Franklin Lakes, NJ, USA) are sometimes used for protection of the bronchial stump to prevent bronchial fistula. However, there have been reports of foreign body-related bronchial granulation in the distant phase. Treatment of this rare complication is challenging, and there are no reports in the literature of cases that ultimately underwent curative surgical excision.

Read full article >

Long-Term Survival after Choroidal Metastasis Following Colorectal Cancer Surgery: A Case Report

Keiichiro Ryujin, et al.

INTRODUCTION: Choroidal metastasis from colorectal cancer is extremely rare, accounting for approximately only 4% of all choroidal metastases. However, with the increasing incidence and improved survival rates of colorectal cancer, the importance of diagnosing and treating ocular metastases is growing. We report a case of choroidal metastasis from colorectal cancer and review the relevant literature.

Read full article >

Successful Conversion Surgery for Unresectable Microsatellite Instability–High Pancreatic Tail Cancer Following Pembrolizumab Therapy

Nobuhiro Harada et al.

INTRODUCTION: Pembrolizumab was approved for the treatment of microsatellite instability (MSI)–high pancreatic cancer that is unresponsive to systemic chemotherapy. However, pancreatic cancer has a low prevalence of MSI-high status (<1%). We report a rare case of MSI-high pancreatic tail cancer successfully treated with pembrolizumab, which enabled conversion surgery to be performed.

Read full article >

Chylopericardial Tamponade Accompanied by Chylothorax after Right Upper Lobectomy: A Rare but Fatal Postoperative Complication

Koichi Fukumoto, et al.

INTRODUCTION: Postoperative chylothorax after thoracic surgery is relatively rare, and cardiac tamponade accompanied by the former is a scarce phenomenon. Although there have been scarce reports of such cases in cardiac surgery, reports on general thoracic surgery are exceedingly rare.

Read full article >

A Rare Case of Mediastinal Seminoma with Granulomatous Features: Diagnostic and Therapeutic Considerations

Ryusei Yoshino, et al.

INTRODUCTION: Although seminomas typically arise in the testes, primary mediastinal seminomas are classified as extragonadal germ cell tumors. Diagnosis is often challenging and requires not only blood tests and imaging but also a tumor biopsy. However, diagnosis may be particularly difficult when the tumor shows nonspecific pathological features or is accompanied by granulomatous changes.

Read full article >

Therapeutic Effect of Tranilast on Lung Tumors Suspected of Being Staple Line Granulomas: Report of Two Cases

Ayato Ura, et al.

INTRODUCTION: A staple line granuloma (SG) in the lung, which arises adjacent to a staple line after lung surgery, is often difficult to differentiate from a stump recurrence. We report two cases of lung tumors that were suspected of being SGs, and the tumors resolved after the use of oral tranilast.

Read full article >

Gastroduodenal Intussusception with Gastric Adenocarcinoma: A Case Report and Review of the Literature

Ryota Omura, et al.

INTRODUCTION: Intussusception in adults is a rare condition, and gastric cancer prolapsing into the duodenum is an even rarer phenomenon. We present a case of early gastric cancer originating in the gastric body with duodenal intussusception and discuss the clinical considerations based on the patient’s overall condition and existing literature.

Read full article >

An Extremely Rare Case of Coexisting Neuroendocrine Carcinoma and Tumor of the Whole Pancreas with Hepatoid Differentiation

Dongha Lee, et al.

INTRODUCTION: Hepatoid carcinoma (HC) is a rare type of malignant tumor that shares similar serological, morphological, and immunohistochemical features with hepatocellular carcinoma. Pancreatic HC exhibits aggressive biological behavior and is classified as pure type, combined type, and mixed type. Unlike the pure type, the combined and mixed types refer to HC with other histological components. While the most common component is the neuroendocrine tumor (NET), no case of coexistence of neuroendocrine carcinoma (NEC) and NET with hepatoid differentiation has been reported. We herein report an extremely rare case of coexisting NEC and NET of the whole pancreas with hepatoid differentiation.

Read full article >

Curative Gastrectomy for Advanced Gastric Cancer in a Patient with Idiopathic Multicentric Castleman Disease: A Rare Case Report

Ryohei Kawabata, et al.

INTRODUCTION: Idiopathic multicentric Castleman disease (iMCD) is a rare lymphoproliferative disorder characterized by systemic inflammation and chronic immunosuppression. When solid malignancies such as gastric cancer arise in patients with iMCD, perioperative management becomes particularly challenging due to nutritional decline, reactive lymphadenopathy, and elevated surgical risk.

Read full article >