Liver metastases of a malignant solitary fibrous tumor: the important role of immunohistochemistry in this rare entity.

Solitary fibrous tumor (SFT) is a rare neoplasm of mesenchymal origin that normally appears in the pleura; however, it has been described in other extrapleural locations. This tumor is rarely malignant and only a few cases of metastatic SFT have been described.

Metalloproteinases 1 and 3 as Potential Biomarkers in Breast Cancer Development.

Breast cancer continues to be one of the main causes of morbidity and mortality globally and was the leading cause of cancer death in women in Spain in 2020. Early diagnosis is one of the most effective methods to lower the incidence and mortality rates of breast cancer. The human metalloproteinases (MMP) mainly function as proteolytic enzymes degrading the extracellular matrix and plays important roles in most steps of breast tumorigenesis. This retrospective cohort study shows the immunohistochemical expression levels of MMP-1, MMP-2, MMP-3, and MMP-9 in 154 women with breast cancer and 42 women without tumor disease. The samples of breast tissue are assessed using several tissue matrices (TMA). The percentages of staining (≤50%->50%) and intensity levels of staining (weak, moderate, or intense) are considered. The immunohistochemical expression of the MMP-1-intensity (p = 0.043) and MMP-3 percentage (p = 0.018) and intensity, (p = 0.025) present statistically significant associations with the variable group (control-case); therefore, expression in the tumor tissue samples of these MMPs may be related to the development of breast cancer. The relationships between these MMPs and some clinicopathological factors in breast cancer are also evaluated but no correlation is found. These results suggest the use of MMP-1 and MMP-3 as potential biomarkers of breast cancer diagnosis.

Differential Diagnosis of Hepatic Mass with Central Scar: Focal Nodular Hyperplasia Mimicking Fibrolamellar Hepatocellular Carcinoma.

Fibrolamellar hepatocellular carcinoma is a primary hepatic tumor that usually appears in young adults. Radical surgery is considered curative for this kind of tumor, so early diagnosis becomes essential for the prognosis of the patients. The main characteristic of this entity is the central scar, which is the center of differential diagnosis. We report the case of a 30-year-old man who was diagnosed with fibrolamellar hepatocellular carcinoma by ultrasonography. Contrast-enhanced CT confirmed this diagnosis, and the patient underwent a [18F] fluorocholine PET/CT. Hypermetabolism and the morphology in the nuclear medicine exploration suggest neoplastic nature of the lesion. Radical surgery was performed, and histopathologic analysis was performed, which resulted in focal nodular hyperplasia. Hepatic masses with central scar could have a difficult differential diagnosis, and focal nodular hyperplasia could mimic fibrolamellar hepatocellular carcinoma imaging patterns. These morphofunctional characteristics have not been described in [18F] Fluorocholine PET/CT, so there is a need to find out the potential role PET/CT in the differential diagnosis of hepatic mass with central scar.

Réplica a «Respuesta a resultados en el tratamiento de traumatismos esplénicos utilizando un protocolo multidisciplinar en 110 pacientes consecutivos en un hospital de nivel ii» / Reply to «Response to management of splenic injuries utilizing a multidisciplinary protocol in 110 consecutive patients at a level II hospital»

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Reconstrucción del conducto biliar mediante tubos tridimensionales de colágeno / Bile duct reconstruction using 3-dimensional collagen tubes

Introducción En la actualidad el tratamiento de la vía biliar extrahepática afectada por cáncer, estenosis, lesiones iatrogénicas y otras patologías consiste en la resección de las mismas, y una anastomosis en los casos más graves de la placa hiliar biliar al intestino delgado. Material y métodos Nuestro grupo ha desarrollado un tubo tridimensional de colágeno y agarosa para reparar la vía biliar. Se emplearon 40 animales de experimentación, que fueron estudiados fisiológica e histológicamente a las 4 semanas, 3 y 6 meses. Conclusiones Nuestras prótesis mostraron gran histocompatibilidad y mantenían una normofisiología que hace pensar en las posibles aplicaciones clínicas que podrían tener en un futuro (AU)

Introduction In recent years, with widespread laparoscopic cholecystectomy and liver transplantation, complications involving the biliary system are increasing. All current techniques have a high risk of recurrence or high-morbidity. Material and methods A 3-dimensional collagen bile duct modified with agarose hydrogel was developed to substitute the affected extrahepatic bile duct. It was used in 40 guinea pigs and the histology and physiology was studied at 4 weeks, 3 and 6 months after transplantation. Conclusions The graft shows to have a high potential in applications to treat hepatobiliary diseases which require surgery (AU)

[Bile duct reconstruction using 3-dimensional collagen tubes]. / Reconstrucción del conducto biliar mediante tubos tridimensionales de colágeno.

INTRODUCTION: In recent years, with widespread laparoscopic cholecystectomy and liver transplantation, complications involving the biliary system are increasing. All current techniques have a high risk of recurrence or high-morbidity. MATERIAL AND METHODS: A 3-dimensional collagen bile duct modified with agarose hydrogel was developed to substitute the affected extrahepatic bile duct. It was used in 40 guinea pigs and the histology and physiology was studied at 4 weeks, 3 and 6 months after transplantation. CONCLUSIONS: The graft shows to have a high potential in applications to treat hepatobiliary diseases which require surgery.

Tissue-engineering repair of extrahepatic bile ducts.

BACKGROUND: In recent years, with the widespread use of laparoscopic cholecystectomy and liver transplantation, complications involving the biliary system are increasing. All techniques available have a high risk of recurrence or high-morbidity problems. We developed a three-dimensional collagen duct modified with agarose hydrogel, to substitute the affected extrahepatic bile duct. MATERIALS AND METHODS: We used it in 40 guinea pigs and studied the histology and physiology at 4 wk, 3, and 6 mo after transplantation. Blood test, histologic techniques, and cholangiography were performed in all of them. RESULTS: All experimental animals survived up to their sacrifices. Our graft showed highly potential applications to treat hepatobiliary diseases that require surgery.