No abstract

Background: Studies have reported factors affecting the efficacy of subcutaneous venous chest port catheters placed into jugular or subclavian veins using a radiological technique. There is ongoing debate for this efficacy in these series.

A 16-year-old female patient was examined 1.5 years previously for pain and swelling distal to the left femur and a diagnosis of Ewing sarcoma was made. Check-up 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) investigation after the 14th dose of chemotherapy showed high uptake masses in both breasts ( Fig. 1). After FDG-PET, ultrasound (US) and dynamic breast magnetic resonance imaging (MRI) performed. On US heterogenic hypoechoic solid masses, the largest 40 9 23 mm in the right breast were identified in both breast (Fig. 2). By dynamic breast MRI, we found that on axial T1weighted images the masses were hypointense, while on T2-weighted and STIR sequences the masses were hyperintense, on dynamic contrast series masses showed heterogenous enhancement with central necrotic focuses (Figs. 3 and 4). Measurements made on the dynamic series in different areas of the lesions found a type 2 contrast pattern. With these findings, an excisional biopsy was performed on the largest lesion in the right breast. Histopathological examination showed a malignant tumor composed of small round cells, with CD 99 positive, confirming the diagnosis of Ewing sarcoma metastasis (Fig. 5).Ewing sarcoma is a primary malignant small, round, and blue cell tumor. It is an infrequent disease in which cancer cells are found in the bone or in soft tissue. The most common areas in which it occurs are the pelvis, the femur, the humerus, the ribs and clavicle. Ewing sarcoma occurs most frequently in teenagers and young adults, with a male/female ratio of 1.6:1. Ewing sarcoma usually metastasizes to lungs, pleura, and other bones. Lymph nodes and liver may be occasionally involved. The metastasis of Ewing sarcoma into breast tissue is relatively uncommon with Figure 1. In the axial PET CT image, there is a increased FDG involvement in both breasts.Figure 2. Ultrasonography of the lesion showing a well-defined, spherical,heterogeneous, and hypoechoic solid mass (40 9 23 mm in size) in the right breast which has millimetric hypoechoic necrotic foci.

To examine factors on patency times including complications of subcutaneous venous chest ports insertion using ultrasonography guidance in 1,408 patients with long-term follow-up.

Our purpose is retrospectively to investigate the effect of factors on the patency of subcutaneous central venous port catheters inserted to 626 colorectal carcinoma patients.