CASE REPORTS
Concomitant surgical treatment of a chondrosarcoma of the chest wall and a desmoid tumor of the gastrointestinal tract

Introduction

Concomitant development of a chondrosarcoma of the chest wall and a desmoid tumor of the gastrointestinal tract is a rare phenomenon. In both Polish and global literature, cases of chest wall chondrosarcomas are presented in the form of case reports. In terms of location, this cancer is most often found in the pectoral girdle, pelvis, and ribs, and less frequently in other bones [1, 2]. Desmoids of the gastrointestinal tract are much more common; notwithstanding, their incidence in Europe is estimated at approximately 2 cases per 1 m inhabitants per year.
Desmoid tumors of the gastrointestinal tract develop primarily in patients between the ages of 40 and 70, but have sometimes been observed in younger individuals and children [3, 4]. However, no case has previously been described in which a chest wall chondrosarcoma was concomitant with a desmoid tumor of the gastrointestinal tract.
The aim of this report is to present the case of a female patient diagnosed with the presence of a chest wall chondrosarcoma and an intestinal desmoid tumor that were treated with concomitant surgery.

Case study

The 62-year-old patient was diagnosed with the presence of two tumors based on computed tomography. One tumor was located in the vicinity of the right costal margin, while the other was in the mesojejunum, near the ligament of Treitz, encompassing a fragment of the wall of the first jejunal loop. Both tumors qualified for surgical treatment. The only symptom presented by the patient was a small deformation on the right side of the chest wall; the lesions were not painful. The patient’s medical history included surgical treatment conducted 28 years prior due to a desmoid tumor of the rectus abdominis muscle and uterine myomas.
Physical examination demonstrated the chest tumor to be exophytic, 10 cm in diameter, cohesive, and skin-colored; the tumor did not move in relation to the base and was not painful. Physical examination of the abdomen demonstrated it to be soft, without peritoneal signs or palpable pathological resistance. The lymph nodes were not enlarged, and the performed laboratory investigation revealed no abnormalities.

Procedure

The procedure was conducted under general anesthesia, using two independent surgical access points (under the right costal margin and from a median incision of the abdomen) enabling good visualization of both tumors (Fig. 1). In intraoperative evaluation, the largest dimension of the tumor on the right costal margin was 15 cm; there were no signs of infiltration of the liver or other structures of the abdominal cavity. The other tumor was located in the mesojejunum near the ligament of Treitz; it adhered closely to the splenic flexure of the colon, but without infiltration. Palpation did not reveal metastases to the liver, the parietal or visceral peritoneum, or other abdominal organs (Fig. 2).
After the assessment of the abdominal organs, a decision was made to resect both tumors. During the resection of the chest wall tumor, substantial parts of ribs 6, 7, and 8 were excised in order to achieve oncological radicality. The rib stumps were repaired with coaptation sutures. Additionally, an infiltrated fragment of the diaphragm was excised, and the resulting defect was repaired with polypropylene mesh; active drainage was applied to the pleural cavity (Fig. 3A).
The next stage of the procedure consisted in the resection of the intestinal tumor. After the incision of the visceral peritoneum, the mesenteric vessels were uncovered, showing no infiltration by the tumor mass. The tumor was excised together with the surrounding jejunum (Fig. 3B). The intestinal stumps were closed with linear staplers; after duodenal mobilization, a two-layer side-to-side anastomosis was performed. The postoperative course was uneventful.
The patient was discharged on the 20th postoperative day. Follow-up was conducted on an outpatient basis. The evaluation of histopathological slides and oncological consultation showed that the patient did not require complementary treatment. During 2 years of follow-up, no signs of recurrence were observed with regard to the chest wall or the abdominal organs. Postoperative histopathological examination of the costal margin tumor confirmed the diagnosis of chondrosarcoma, and the tumor in the mesojejunum was confirmed to be a desmoid tumor (Fig. 4).

Discussion

Chondrosarcoma is a malignant cancer producing cartilaginous tissue. It is the second most common skeletal neoplasm after osteosarcoma. Chondrosarcoma most often develops between the ages of 50 and 70. It occurs slightly more often in men than in women (1/5 : 1). It may develop in any bone, but is most often found in the pelvis, chest bones, and the scapulas [4, 5].
Our patient suffered from a chest wall sarcoma of cartilaginous origin (chondrosarcoma), which constitutes 15% of all reported cases of such neoplasms. The goal of treating chondrosarcomas is their radical resection [6, 7]. It is important for patients with these tumors to be treated in experienced medical centers, as only interdisciplinary management may result in achieving the best outcomes [8-10]. Frequently, non-standard management is required as well as the participation of both oncological and thoracic surgeons. In our case, it was necessary to reconstruct the chest wall and the rib stumps using coaptation sutures and to repair the diaphragmatic defect with polypropylene mesh.
Desmoids are a rare type of tumor originating from the cells of the fascia or musculotendinous tissue. Although lack of metastasis is characteristic, desmoids often infiltrate the surrounding tissue: if the resection is not radical, this results in local recurrence [4].
According to the clinical classification of desmoids developed by Church et al., the present case was evaluated as stage 3. In accordance with the suggestions included in the classification, our case could have been treated conservatively, using pharmacotherapy: non-steroidal anti-inflammatory drugs, tamoxifen, raloxifene, vinblastine, or methotrexate [3]. However, due to the concurrent presence of the chest wall tumor, surgery was considered to be a more optimal treatment option.
In the case of abdominal tumors, radical surgery is particularly difficult. Desmoids are associated with a high risk of local recurrence [3, 4]. In the present case, radical surgery was performed as the tumor had not infiltrated the surrounding tissues and vessels. As there are no clear standards on the subject, the management of desmoid tumors should always be tailored to individual patients, and the employed treatment should consider the patient’s quality of life. Apart from physical examination and imaging examinations, intraoperative assessment of the tumor is the most important factor for deciding whether the tumor can be resected [8-10]. In the present case, radical surgery alone was considered to be the most appropriate treatment option for our patient.
We decided to present this report because the subject literature features no case in which an intra-abdominal desmoid tumor is concomitant with a chest wall chondrosarcoma. The lack of infiltration as well as the size and location of the tumors at the time of diagnosis enabled the performance of a radical surgical treatment. No uniform algorithm describes patient management in cases in which both these neoplasms develop concurrently. The presented management scheme was tailored to the circumstances, and the uneventful postoperative course confirms that the therapeutic decision was correct.

Dislocure

Authors report no conflict of interest.

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