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ABDOMEN / Colon Rectum 53 / F, Perianal palpable mass
Number of Applicants : 39
2023-10-01
About Author | |
Authors | Heejin Kwon |
Institution | Dong-A university Hospital |
risual@dau.ac.kr |
About Case | |||
Chief complaint or Title |
Perianal palpable mass | ||
Age | 53 | Sex | F |
Difficulty | For resident, For specialist | ||
Modality | US, CT, MR |
Case Figures | |||||||||
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Questions | ||
What is your diagnosis? |
Answer | |||
Diagnosis | leiomyoma | ||
Comments | Perianal leiomyoma }A benign tumor of mesenchymal origin arise from smooth muscle fibers }Their pathogenesis remains obscure }Leiomyoma can occur in various organs and may develop in deep soft tissues where smooth muscle is not present. } vDeep soft-tissue leiomyomas can be classified into }Leiomyomas of somatic soft tissue (somatic leiomyoma) }Usually occur in the extremities (usually in thigh) }Affect the sexes equally }RetroperitonealR11;abdominal leiomyomas }Usually occur in the pelvic retroperitoneum }Affect preferentially in women, during perimenopausal period }Histologically similar and analogous to uterine leiomyomas }Hormone receptors (+) : estrogen, progesterone vImmunohistochemistry }Smooth muscle actin and desmin : (+) }CD117 (KIT) and S100 : (-) }Estrogen and progesterone receptor (+) }Useful for preoperative staging }Define relationship b/w the sphincters and urogenital tract }Well-defined homogeneous mass }Transanal US : ovoid hypoechoic mass }T2WI : heterogeneous iso to mildly high SI compared with that of pelvic muscles, Thin rim with low SI }Homogeneous enhancement }A beak sign }Origin of mass is in internal anal sphincter External anal sphincter were stretched to allow passage through |
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References | |||
Keywords | Perianal, submucosal mass, tumor | ||
Attachment File | - |
Number of Applicants : 39
Correct Answer | 17 |
Shiga University of Medical Science | Akitoshi Inoue |
Dokkyo Medical University | Arakawa Hiroaki |
Biotypos - Greece | Ioannis E. Papachristos |
Osaka Metropolitan University hospital | Tatsushi Oura |
University of Tokyo | Toshihiro Furuta |
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