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ABDOMEN / Colon Rectum   70 / F,  incidentally found rectosigmoid junction tumor on colonoscopy
2019-04-18
About Author
Authors Sunyoung Lee
Institution Severance Hospital, Yonsei University College of Medicine
E-mail carnival0126@gmail.com
About Case
Chief complaint
or Title
incidentally found rectosigmoid junction tumor on colonoscopy
Subspecialty ABDOMEN / Colon Rectum
Classification Neoplasm, benign / neurogenic
Age 70 Sex F
Difficulty For specialist
Modality CT
Case Figures
Click above Figure for more images.
Questions
What is your most likely diagnosis of this lesion? 1. GIST 2. Schwannoma 3. NET 4. Leiomyoma
Answer
Diagnosis 2. Schwannoma
Comments

Colorectal schwannoma

 





Rare
tumors derived from the cells of Schwann that form the neuronal sheath


2-6% of all mesenchymal tumors /
Colorectal schwannoma is extremely rare


 



DDx with colorectal GIST


Small size


Non-rectum location


Smooth margin


Homogeneous high attenuation without necrosis


Presence of enlarged LNs


Treatment: Polypectomy or segmental
colectomy



References Oncol Lett. 2016 Apr; 11(4): 2580–2582
Keywords schwannoma
Attachment File -

Number of Applicants : 43
Correct Answer 29
Mayo Clinic Akitoshi Inoue
Mallinckrodt Institute of Radiology Naganathan Mani
The University of Tokyo Hospital Toshihiro Furuta
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