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ABDOMEN / Colon Rectum   70 / F,  incidentally found rectosigmoid junction tumor on colonoscopy
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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