Fig. 1Colonoscopy shows polypoid masses covered by intact mucosa in the cecum (A) and descending colon (B).
Fig. 2Computed tomography findings of uterus-like masses. A small, ovoid, enhancing mass (arrows) is shown in the lumen of the cecum (arrowheads) (A). A dumbbell-shaped, lobulating solid mass containing a cystic portion (arrows) is observed in the descending colon (arrowheads) (B). A round, solid mass containing a cystic portion (arrows) is noted in the medial aspect of the descending colon (C).
Fig. 3(A, B) Histologically, the mass shows a cavity lined by endometrial glands and stroma and surrounded by smooth muscles. (C) Immunostaining with smooth muscle actin is positive in the smooth muscle cells and focally positive in the endometrial stromal cells of the mass. (D) Immunostaining with estrogen receptor is positive in all components of the mass (left), whereas it is negative in the colonic smooth muscles (right).
Table 1.Clinical features of previously reported cases of uterus-like mass
Authors |
Age/sex |
Location |
Size (cm) |
Clinical presentation |
Treatment |
Associated conditions |
Cozzutto [1] |
32/F |
Ovary |
6 |
LAP |
Mass excision |
Unilateral renal agenesis, endometriosis |
Pai et al. [2] |
38/F |
Both ovariesa
|
4 and 3 |
Incidental finding |
BO |
Invasive ductal carcinoma |
43/F |
Ovary |
11.5 |
Pelvic mass |
Mass excision |
None |
39/F |
Ovary |
13 |
LAP, vaginal spot |
TH + UO |
Adenomyosis |
Tijani et al. [3] |
35/F |
Uterus |
21 |
LAP, dysmenorrhea |
Mass excision |
None |
Matsuzaki et al. [4] |
29/F |
Uterosacral ligament |
7.5 |
LAP, dysmenorrhea |
Mass excision |
None |
Carinelli et al. [5] |
46/F |
Pelvic wall and mesenterya
|
Up to 10 |
LAP, constipation |
Partial colectomy |
Endometriosis, leiomyomatous nodules |
39/F |
Ovary and pelvic walla
|
Up to 3.5 |
LAP, dysmenorrhea |
Mass excision |
Endometriosis, leiomyomatous nodules |
Sharma et al. [6] |
33/F |
Conus medullaris |
3 |
Lower back mass |
Mass excision |
Spnia bifida, subcutaneous lipoma, tethered cord |
24/F |
Conus medullaris |
NA |
Lower back pain |
Mass excision |
Tethered cord |
Rohlfing et al. [7] |
35/F |
Obturator lymph node |
4.5 |
Lymph node enlargement |
TH + mass excision |
Squamous cell carcinoma of cervix |
Seki et al. [8] |
44/F |
Inguinal soft tissue |
3.8 |
LAP |
Mass excision |
Endometriosis |
Redman et al. [9] |
50/F |
Vagina |
8 |
LAP, dysuria |
Mass excision |
Ureteral stricture |
Peterson et al. [10] |
12/F |
Ileum |
2.5 |
Incidental finding |
Segmental resection |
Lower intestinal and urinary tract anomaly |
Horie and Kato [11] |
59/F |
Ileal mesentery |
14 |
Abdominal mass |
Mass excision |
None |
Shin et al. [12] |
31/F |
Sigmoid mesocolon |
3 |
LAP |
Partial colectomy |
None |
Rougier et al. [13] |
18/F |
Conus medullaris |
2.5 |
Paresthesia |
Mass excision |
Spina bifida |
Jung et al. [14] |
43/F |
Uterus |
3 |
Menorrhagia, dysmenorrhea |
TH |
Adenomyosis |
52/F |
Uterus |
8 |
Vulvar itching |
TH+USO |
Endometriosis |
Pai et al. [15] |
25/F |
Broad ligament |
20 |
Abdominal mass |
Mass excision |
None |
Present case |
39/F |
Cecum, colon, and mesocolona
|
5 |
LAP, anemia |
Partial colectomy |
Endometriosis |