gastrointestinal leiomyosarcoma

Totally

laparoscopic resection using delta-shaped anastomosis of jejunal leiomyosarcoma with intussusception at the angle of Treitz: a case report. Preoperative imaging findings. a Endoscopic findings: enteroscopy revealed an easily hemorrhagic tumor in the jejunum. b Findings of the small bowel series using meglumine sodium amidotrizoate: a tumor (white arrow) was found in the jejunum at the angle of Treitz. c Contrast-enhanced computed tomography findings: The tumor with intussusception appeared as a reniform shape (pseudokidney sign) longitudinally and demonstrated multilayered concentric rings of mass (target sign) transversely. A tumor with intussusception and regional lymph node swelling was located at the angle of Treitz. d Findings of the fluorodeoxyglucose positron emission tomography: this tumor had marked hypermetabolism, showing a standardized uptake value (SUV) max of 8.3, and the swollen regional lymph node showed mild hypermetabolism with a SUV max of 3.7

surgicalcasereports.springeropen.com • CC-by-4.0

Laparoscopic

surgery to treat leiomyosarcomas of the sigmoid colon:a case report and literature review. a Endoscopic findings: colonoscopy revealed a large polypoidal tumor in the sigmoid colon. b Contrast-enhanced computed tomography findings: the position of the tumor is indicated; no metastasis to lymph nodes or a distant site was evident

surgicalcasereports.springeropen.com • CC-by-4.0

Transanal

total mesorectal excision for a large leiomyosarcoma at the lower rectum: a case report and literature review. Contrast-enhanced computed tomography: a horizontal and b coronal sections. A large circle mass, 7.5 cm in diameter, was detected at the lower rectum. It occupied almost all space of the lesser pelvis. P prostate, T tumor

surgicalcasereports.springeropen.com • CC-by-4.0

Rectal

leiomyosarcoma as the initial phenotypic manifestation of Li–Fraumeni-like syndrome: a case report and review of the literature. Nuclear magnetic resonance of the pelvic region with an expansive mass in the rectum (shown by arrows). Cross-sections of T1 (A) and T2 (B)

jmedicalcasereports.biomedcentral.com • CC-by-4.0

Lizenz: CC BY-SA 4.0

Leiomyosarkome des Gastrointestinaltraktes
gastrointestinal leiomyosarcoma

Leiomyosarkom Radiopaedia • CC-by-nc-sa 3.0 • de

Leiomyosarcomas are extremely rare malignant neoplasms that originate from smooth muscle cells and may be considered the malignant counterpart of a leiomyoma. They are classified as a soft tissue tumor and account for ~8% of malignant soft tissue tumors .

Pathology

Location

Leiomyosarcomas can potentially occur anywhere where there is smooth muscle. Commonly described sites include the following:

uterus: uterine leiomyosarcoma: most common (account for up to one-third of uterine sarcomas )
retroperitoneum: retroperitoneal leiomyosarcoma; most common non-uterine site
stomach: gastric leiomyosarcoma
esophagus : esophageal leiomyosarcoma
small intestine: leiomyosarcoma of the small intestine
liver: hepatic leiomyosarcoma
bladder
nasopharynx
bone: primary leiomyosarcoma of bone
venous structures
- inferior vena cava leiomyosarcoma
- pulmonary artery leiomyosarcoma
central nervous system: primary intracranial leiomyosarcoma

Other sites include

spermatic cord: spermatic cord leiomyosarcoma
pulmonary artery: primary pulmonary artery leiomyosarcoma

Radiographic features

Morphological imaging features would be invariably dependent on the site (refer to individual articles). Generally, they tend to be large masses, especially with abdominopelvic lesions.