What is a colonic leiomyoma?
Colonic leiomyomas are smooth muscle cell tumors originating from either the muscularis mucosa or the proper muscle. These tumors may occur throughout the entire digestive tract, but are rarely seen in the colon and the rectum, where they account for only 3% of all gastrointestinal (GI) leiomyomas .
What is leiomyoma of sigmoid colon?
Colonic leiomyomas are rare benign tumors that constitute about 3% of gastrointestinal smooth muscle tumors . They often originate either from the muscularis mucosae or the proper muscle itself and frequently occur after the age of 50 years, predominantly in men [2,3].
What percent of colon tumors are benign?
92 percent of the colorectal polyps in patients referred for operations were noncancerous, suggesting advanced endoscopic treatments may be a viable option.
What are benign smooth muscle tumors called?
A leiomyoma, also known as a fibroid, is a benign smooth muscle tumor that very rarely becomes cancer (0.1%). They can occur in any organ, but the most common forms occur in the uterus, small bowel, and the esophagus.
What is a benign hyperplastic polyp?
Hyperplastic gastric or stomach polyps appear in the epithelium, the layer of tissue that lines the inside of your stomach. Hyperplastic polyps are usually found during a colonoscopy. They’re relatively common and usually benign, meaning they aren’t cancerous.
What is gastric GIST?
Gastrointestinal stromal tumors (GISTs) are soft tissue sarcomas that can be located in any part of the digestive system. Their most common sites are the stomach and small intestine. GIST s start in specialized nerve cells located in the walls of your digestive system.
What is colonic mucosa?
Colonic mucosa is a term used to describe the specialized tissue that covers the inside of the colon. The colon is a long, hollow organ and part of the digestive tract. It starts at the end of the small bowel (the ileum) and ends at the anal canal.
What is submucosal leiomyoma?
Submucosal leiomyomas of the uterus refer to a subtype of uterine leiomyoma that primarily projects into the endometrial cavity. They are least common albeit the most symptomatic type of leiomyoma.
Can a surgeon tell if a tumor is cancerous by looking at it?
Cancer is nearly always diagnosed by an expert who has looked at cell or tissue samples under a microscope. In some cases, tests done on the cells’ proteins, DNA, and RNA can help tell doctors if there’s cancer. These test results are very important when choosing the best treatment options.
What is the average size of a colon tumor?
Results: Median tumor size was 4.5 cm (range, 0.6-15). Tumor size exceeding 4.5 cm was observed in 159 patients (44%) and was associated with high T and N classification, UICC stage, and tumor grade. At median follow-up of 45 months (range, 0-180), 141 patients (40%) showed tumor progression.
Is leiomyoma a real tumor?
Leiomyomas are benign tumors arising from smooth muscle, most commonly seen in uterine myometrium, gastrointestinal tract, skin and lower extremities of middle-aged women.
Can leiomyoma turn malignant?
In conclusion malignant transformation of benign leiomyoma to leiomyosarcoma, although a rare occurance but can happen in certain patients with large myomas, post menopausal women, rapid growing myomas and in certain subset of leiomyoma.
How is a leiomyoma of the colon treated?
Most gastrointestinal leiomyomas are found in the stomach, only 3% of them arising in the colon. Surgical resection of the leiomyoma is usually necessary owing to its submucosal location. We describe a patient with a 1.5 cm pedunculated leiomyoma of the colon successfully removed by colonoscopic snare electrocauterization.
Where do leiomyomas occur in the gastrointestinal tract?
As pertains to the gastrointestinal tract, leiomyomas occur most frequently in the esophagus while the colorectum is a relatively infrequent site of occurrence, accounting for 3% of all the gastrointestinal leiomyomas [ 2 – 5 ].
What is the difference between esophageal and colonic leiomyomas?
Since a majority of esophageal leiomyomas originate from the proper muscle layer, they present as sessile lesions covered with intact esophageal mucosa, that is, the typical appearance of subepithelial tumors. Meanwhile, it has been reported that colonic leiomyomas arise from the muscularis mucosae.
What is the prognosis of leiomyomas of muscularis mucosae?
Based on follow-up data on 29 patients, leiomyomas of muscularis mucosae are benign. They should be separated from gastrointestinal stromal tumors that have a clinicopathologic spectrum including frequent disease-related mortality.