Quiz of the Week
| Quiz of the Week
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ABDOMEN / Colon Rectum 53 / F, Perianal palpable mass
Number of Applicants : 39
| 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 |
| 계명대학교 동산병원 | 김병제 |
| 강동경희대학교병원 | 류혜선 |
| - | 변성환 |
| 중앙보훈병원 | 신윤경 |
| 세브란스병원 | 윤자경 |
| 서울대병원 | 이강휘 |
| 의정부성모병원 | 이수림 |
| 서울의료원 | 이용주 |
| 보라매병원 | 장시원 |
| 중앙보훈병원 | 조상현 |
| 서울대학교병원 | 홍성호 |
| 서울의료원 | 홍혁기 |