Ovarian dermoid cyst complicated by small bowel obstruction, entero-ovarian fistula formation, and malignant degeneration

Ileo-dermoid Fistula: A Rare Presentation of Ovarian Dermoid

Mature cystic teratoma is a benign ovarian tumor that usually presents in reproductive-age females. This tumor usually presents with pain abdomen, bloating, and a lump. Hereby, we describe a case of an ovarian dermoid presented with features of intestinal obstruction secondary to ileo-dermoid fistula formation. A 55-year-old postmenopausal female presented with lower abdominal pain, nausea, vomiting, and the feeling of a lump in the abdomen. On evaluation and imaging, it was diagnosed as a large ovarian dermoid (with malignant transformation) with multiple fistulous communications with ileal loops. The patient was managed by laparotomy, total abdominal hysterectomy with bilateral salpingo-oophorectomy, bowel resection, and anastomosis. The patient was discharged in good condition. The rupture of malignant ovarian dermoid followed by enterodermoid fistula formation and intestinal obstruction is rare. Complete cytoreduction and bowel repair should be considered for optimal results.

Adnexal Torsion of a Mature Cystic Ovarian Teratoma With Hemorrhagic Infarction Misdiagnosed As Pelvic Inflammatory Disease in a Perimenopausal Patient: A Case Report

Mature cystic teratomas are common benign ovarian tumors. They usually occur in young women, less than 40 years old. Our case report concerns a patient of perimenopausal age who came to the hospital complaining about mild abdominal pain, fever below 37.8°C, and diarrhea. The patient had an intrauterine contraceptive device inserted. Based on the clinical findings and imaging, a possible diagnosis of pelvic inflammatory disease was set, and intravenous administration of broad-spectrum antibiotics started immediately. The decision for performing laparotomy was taken after the fact that the clinical condition and blood tests of the patient had shown no improvement. Intraoperatively, the presence of a large twisted ovarian mass with signs of total necrosis due to adnexal torsion was detected. A histological examination of the surgical specimen confirmed the diagnosis of mature cystic teratoma in the right ovary. The postoperative course was uneventful. The presentation of the case follows a brief literature review of this rare medical condition regarding the diagnostic and therapeutic approach of these patients.

Tumor-Bowel Fistula as a Rare Form of Recurrent Ovarian Cancer-Imaging and Treatment: Preliminary Report

BACKGROUND

The aim of this pilot study was to evaluate the value of imaging techniques, including computed tomography (CT) and magnetic resonance imaging (MRI), in the diagnosis of a tumor-bowel fistula as a rare form of epithelial ovarian cancer (EOC) relapse. We also performed an initial assessment of the effectiveness of the treatment of this form of relapse.

METHODS

The study group consisted of eight patients with suspected platinum-sensitive recurrence in the form of a tumor/bowel fistula. All patients finished their first line of chemotherapy and subsequently showed complete remission for 6 months or more. To qualify patients for further treatment, CT and MRI were performed, which suggested the presence of a fistula between the recurrent tumor and intestine. DESKTOP study criteria were used to qualify patients for secondary cytoreduction. Second-line chemotherapy was given after secondary debulking.

RESULTS

In all patients, fistulas formed between the tumor and large bowel. On CT, the fistulas were indirectly visible. In all cases, the fistula was visible on MR images, which showed hypointensity on the T2 and T1 post-contrast sequences but did not show restricted diffusion on the diffusion-weighted imaging (DWI) sequence. Patients who were qualified for the study underwent secondary debulking with bowel resection. In all eight cases, the fistula between the tumor and surrounding organs was confirmed. During surgery, seven intestinal anastomoses and one colostomy were performed. No residual macroscopic tumor remained in seven cases (resection R0-87.5%). The progression-free survival (PFS) was 8.4-22.6 months (median 13.4). In the group with cytoreduction R0, the median PFS was 15.5 months (12-22).

CONCLUSION

In patients with suspected EOC recurrence with clinically suspected fistula, CT scan is not sufficient. In CT, the presence of a fistula is suspected based on indirect symptoms. MRI, as a method with much greater tissue resolution, confirms the diagnosis. In addition, MRI can identify the point of the tumor/bowel junction. This is especially true with a large infiltration covering several intestinal parts. Bowel resection with simultaneous anastomosis is a good and safe solution for these patients. However, appropriate qualification for the procedure is necessary, which will allow for surgery without residual macroscopic disease (R0 surgery). Due to the small number of cases, our results cannot be generalized. We treat them as a hypothesis that can be verified in a larger study.

Ovarian Dermoid (Mature Cystic Teratoma) in a Postmenopausal Woman: Incidence of Sonographic Signs

Ovarian dermoid is a common surgically treatable cause of female infertility. Although the fat component of mature cystic teratoma (MCT) appears hyperechoic on ultrasonography, sometimes it poses a diagnostic challenge to differentiate from a complex ovarian cyst / hemorrhagic cyst. The varied presentation of MCT on ultrasonography is due to varying proportions of components belonging to all three germ cell layers such as epithelium, hair, bone, tooth, and cartilage. This case report describes the high-resolution ultrasonography appearance of MCT in a 48-year-old nulliparous post-menopausal woman and provides an elaborative note on how reliable diagnostic signs of MCT on ultrasonography and prompt recognition of the entity has a favorable outcome on prognosis.

Malignant degeneration of mature cystic teratoma of the ovary with small bowel metastasis incidental serous cystadenoma collision tumor of the right ovary

Mature Cystic Ovarian Teratoma (MCOTs) are the most common benign ovarian neoplasms, representing around 20% of all ovarian neoplasms with middle age women representing the majority of patients. They usually include two germ cell layers being well differentiated and rarely they demonstrate malignant transformation with squamous cell carcinoma being the most common malignant transformation. In our case, we report an interesting case of a 45 years old lady who was unfortunate to have a MCOT with malignant degeneration and distant metastasis. We concluded that MCOT malignant degeneration is rare, however, if not caught early, mortality can be high.

MCOT, Ovary, Small Bowel, Teratoma, Collision tumor