Surgical Case Reports

Single-Incision Laparoscopic Cholecystectomy in a Patient with a Left Ventricular Assist Device

Ayako Ishii, et al.

INTRODUCTION: Laparoscopic cholecystectomy (LC) is the standard treatment for benign gallbladder diseases, including acute cholecystitis (AC). However, performing LC in patients with a left ventricular assist device (LVAD) presents specific technical and physiological challenges related to driveline preservation and hemodynamic stability. We report the first case of single-incision laparoscopic cholecystectomy (SILC) via the right lower abdomen in a patient with an LVAD after treatment for biliary tract infection, following prior surgery for strangulated ileus and umbilical wound infection.

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Two Cases of Intraductal Papilloma with Sebaceous Metaplasia of the Breast

Kurumi Okada, et al.

INTRODUCTION: Intraductal papilloma is a common benign breast lesion that typically presents with nipple discharge or a palpable mass. While apocrine metaplasia is frequently observed, sebaceous metaplasia is very rare in breast lesions, with only a few cases reported to date. We herein describe two surgically resected cases of intraductal papilloma with sebaceous metaplasia, both of which were histologically proven benign following imaging findings that were suspicious for malignancy.

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Laparoscopic Cholecystectomy in a Patient with Low-Lying Costal Arch due to Ankylosing Spondylitis: A Case Report

Tomoyuki Fukami, et al.

INTRODUCTION: Ankylosing spondylitis (AS) is a chronic inflammatory disease primarily affecting the sacroiliac joints and spine, which can lead to bony ankylosis during the healing process. The prevalence of AS in the Japanese population is relatively low, and encounters with such patients in routine clinical practice are uncommon.

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Semi-Urgent Totally Extraperitoneal Repair for Inguinal Hernia Causing Insufficient Intraperitoneal Exchange in a Patient on Peritoneal Dialysis: A Case Report

Yume Yabu, et al.

INTRODUCTION: Inguinal hernias are mechanical complications in patients undergoing peritoneal dialysis (PD) that may threaten the continuation of PD. Herein, we report a rare case in which PD could not be completed owing to outflow failure associated with a large inguinal hernia that was successfully managed with semi-urgent totally extraperitoneal (TEP) repair.

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Spontaneous Regression of Metastatic Colorectal Cancer Following Discontinuation of an Interleukin-6 Receptor Inhibitor: A Case Report

Eiki Miyake, et al.

Abstract INTRODUCTION: Spontaneous cancer regression is exceptionally rare, particularly in colorectal cancer. Tumor regression has been reported in some patients with autoimmune diseases or organ transplants, after cessation of immunosuppressive therapy; however, its underlying mechanisms remain unclear. We report a rare case of Stage IVA transverse colon cancer with synchronous liver metastasis that showed complete pathological regression in both sites after discontinuation of tocilizumab, an interleukin-6 receptor inhibitor.

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Endometriosis-Associated Intestinal Tumor: A Case Report and Literature Review with Comprehensive Proteomic Data

Naoyuki Toyota, et al.

INTRODUCTION: Endometriosis-associated intestinal tumors (EAITs) are rare malignancies that arise from ectopic endometrial tissue, and their clinical and molecular characteristics remain poorly defined.

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Disseminated Mucormycosis with Characteristic Gastric Ulcers and Extensive Intravascular Invasion after ABO-Incompatible Living-Donor Liver Transplantation: A Case Report

Satoshi Takada, et al.

INTRODUCTION: Mucormycosis is a life-threatening invasive fungal infection that occurs mainly in patients who are immunocompromised. Here, we report a case of mucormycosis with characteristic gastric ulcers and severe vascular invasion after ABO-incompatible living-donor liver transplantation.

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Safe Resection of a Giant Mediastinal Liposarcoma with Severe Cardiac Compression

Kazuhiro Mizota, et al.

INTRODUCTION: Dedifferentiated liposarcomas of the mediastinum are exceedingly rare, and surgical resection is the primary treatment of choice. Mediastinal mass syndrome (MMS) is an oncological emergency characterized by compression or invasion of the heart, great vessels, or trachea by a large mediastinal tumor, particularly during the induction of anesthesia. We report a case of a giant dedifferentiated liposarcoma in the anterior mediastinum, surgically resected due to severe cardiac compression and presenting as an oncological emergency.

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Pancreatoduodenectomy for Pancreatic Cancer after Prior Modified Puestow Procedure: A Case Report

Yuiko Nagasawa, et al.

INTRODUCTION: Chronic pancreatitis is a known risk factor for pancreatic cancer and may develop over the course of long-term disease management. When a pancreatectomy is required following pancreatic duct decompression surgery, careful consideration of the surgical approach is necessary due to altered anatomy. This study reports a case of pancreatoduodenectomy for intraductal papillary mucinous carcinoma after the modified Puestow procedure.

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Real-Time Full-Color Overlay Indocyanine Green Navigation for Laparoscopic Deroofing of Liver Cysts

Koya Yoshida, et al.

INTRODUCTION: Laparoscopic deroofing is the standard treatment for symptomatic liver cysts. Indocyanine green (ICG) fluorescence imaging has been effectively used to delineate the boundary between cysts and liver parenchyma; however, intermittent switching between fluorescence and normal light modes is time-consuming and requires memorizing the cutting lines along a curved surface, which can be burdensome during surgery.

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Successful Sphincter-Preserving Resection of a Giant Rectal Schwannoma Using Transanal Total Mesorectal Excision: A Case Report

Mamoru Miyasaka, et al.

INTRODUCTION: Rectal schwannomas are rare, accounting for less than 10% of all gastrointestinal schwannomas. When they are large and located in the lower rectum, achieving complete resection while preserving sphincter function can be technically challenging. Transanal total mesorectal excision (TaTME) provides an enhanced view of the deep pelvis and facilitates precise dissection around the anorectal junction. We report a case of a giant rectal schwannoma that was successfully resected with anal preservation using TaTME.

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Ascitic Fluid Cytology Provides Diagnostic Clues in a Case of Gastric Metastasis from Invasive Lobular Carcinoma of the Breast

Takashi Matsutani, et al.

INTRODUCTION: Breast cancer metastasis to the gastrointestinal tract is rare, and invasive lobular carcinoma (ILC) shows a higher propensity for dissemination than invasive ductal carcinoma. Accurate diagnosis is often challenging because of nonspecific clinical and pathological findings.

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