Sigmoid colon schwannoma is a rare benign gastrointestinal tumor that is challenging to be diagnosed preoperatively.This paper reported a case of sigmoid colon schwannoma that was preoperatively misdiagnosed as a gastrointestinal stromal tumor on ultrasonography.Intraoperative frozen section analysis identified it as a spindle cell tumor,with definitive diagnosis confirmed as gastrointestinal schwannoma via immunohistochemistry.This paper summarizes the similarities and differentiating features of intestinal stromal tumors and schwannomas on ultrasonographic imaging.By analyzing and discussing previous literature,we aim to enhance the diagnostic and differential diagnostic capabilities of ultrasonographers in preoperative evaluation of intestinal schwannomas,thereby providing reliable evidence for clinicians in the diagnosis and management of this condition.
Humans ; Neurilemmoma/diagnostic imaging* ; Ultrasonography ; Sigmoid Neoplasms/diagnostic imaging* ; Male ; Colon, Sigmoid/diagnostic imaging* ; Middle Aged ; Female ; Diagnosis, Differential

Bowel injury after laparoscopic gynecologic surgery is a rare but serious complication. In particular, diagnosis of a patient with bowel injury is difficult because of the unusual patient presentation and remaining intraabdominal gas. We report on a case of a sigmoid colon perforation after laparoscopic gynecologic surgery. A 42-year-old woman with abdominal pain and distention underwent exploratory laparotomy. She had undergone laparoscopic gynecologic surgery 6 days ago. During the procedure, a sigmoid colon perforation was found as well as severe inflammation at the pelvic cavity. The patient underwent segmental resection of the sigmoid colon with loop ileostomy. Postoperative acute abdomen did not show classic signs on physical examination and diagnostic imaging. Thus, a more careful approach and interpretation of diagnosis was needed.
Abdomen, Acute ; Abdominal Pain ; Adult ; Colon, Sigmoid* ; Diagnosis ; Diagnostic Imaging ; Female ; Gynecologic Surgical Procedures* ; Humans ; Ileostomy ; Inflammation ; Laparoscopy ; Laparotomy ; Physical Examination

PURPOSE: To compare and evaluate the diagnostic ability of cone beam computed tomography (CBCT) and magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ). MATERIALS AND METHODS: CBCT and MRI of 46 TMJs of 23 patients with TMJ disorders were evaluated. They were divided into 3 groups according to the position of the articular disc of the TMJ at closed mouth position and the reduction of the disc during open mouth position on MRI : no disc displacement group (NDD), disc displacement with reduction group (DDR), and disc displacement without reduction group (DDWR). With PACS viewing softwares, position of mandibular condyle in the articular fossa, osseous change of mandibular condyle, shape of articular fossa, and mediolateral and anteroposterior dimensions of mandibular condyle were evaluated on CBCT and MRI. Each value was tested statistically. RESULTS: The position of mandibular condyle in the articular fossa were concentric in the NDD, DDR, and DDWR of CBCT and NDD of MRI. However, condyle was positioned posteriorly in DDR and DDWR of MRI. Flattening, sclerosis and osteophyte of the mandibular condyle were much more apparent on DDR of CBCT than MRI. And the erosion of the condyle was much more apparent on DDWR of MRI than CBCT. Box and Sigmoid types of articular fossa were found most frequently in DDR of MRI. Flattened type was found most frequently in DDR of CBCT and deformed type was found most frequently in DDWR of CBCT. No significant difference in mediolateral and anteroposterior dimensions were shown on CBCT and MRI. CONCLUSION: Since MRI and CBCT has unique diagnostic imaging ability, both modalities should be used together to supplement each other to evaluate TMJ.
Colon, Sigmoid ; Cone-Beam Computed Tomography ; Diagnostic Imaging ; Displacement (Psychology) ; Humans ; Magnetic Resonance Imaging ; Magnetic Resonance Spectroscopy ; Magnetics ; Magnets ; Mandibular Condyle ; Mouth ; Osteophyte ; Sclerosis ; Temporomandibular Joint ; Temporomandibular Joint Disorders