Table 1.
Characteristics of the subepithelial lesions detected by lower EUS
| n (%) | |
|---|---|
| SEL characteristics (n=49) | |
| Intramural lesion | 40 (81.6) |
| Extrinsic compression | 2 (4.1) |
| No lesion detected | 7 (14.3) |
| Location (n=49) | |
| Anal canal/anorectal junction | 4 (8.2) |
| Rectum | 30 (61.2) |
| Sigmoid colon | 6 (12.2) |
| Transverse colon | 4 (8.2) |
| Cecum | 2 (4.1) |
| Appendiceal orifice | 3 (6.1) |
| Size (n=49) | |
| <1 cm | 11 (22.4) |
| 1–2 cm | 16 (32.7) |
| 2 cm | 22 (44.9) |
| Final diagnosis *(n=49) | |
| No lesion | 7 (14.3) |
| Rectal Adenocarcinoma | 2 (4.1) |
| Squamous cell carcinoma | 3 (6.1) |
| Other malignant tumors | 3 (6.1) |
| GIST | 4 (8.2) |
| Lymphoma | 2 (4.1) |
| Lipoma | 3 (6.1) |
| Leiomyoma | 5 (10.2) |
| Benign cyst | 4 (8.2) |
| Endometriosis | 2 (4.1) |
| Neuroendocrine tumor | 6 (12.3) |
| Rectal varices | 1 (2.0) |
| Reactive colonic changes – ulcers, abscesses, inflammation | 3 (6.1) |
| Ovarian serous cystadenofibroma | 1 (2.0) |
| Acute appendicitis | 3 (6.1) |
*Final diagnosis was established by the histopathologic examination of the surgically resected specimen, based on the results of other diagnostic investigations, or clinical follow-up. GIST: Gastrointestinal stromal tumors; SEL: Subepithelial lesions.