Implicaciones pronósticas del estudio estandarizado de los márgenes de resección en el cáncer de páncreas

Resumen Introduccion La afectacion microscopica de los margenes de reseccion es un factor pronostico fundamental en la cirugia del cancer de pancreas. Sin embargo, su definicion anatomopatologica no esta estandarizada. Este estudio pretende identificar el porcentaje real de pacientes con resecciones R1 al analizar las piezas quirurgicas con un protocolo estandarizado y evaluar sus implicaciones sobre la supervivencia. Pacientes y metodos Serie de 100 pacientes consecutivos intervenidos por adenocarcinoma ductal de pancreas y resecciones macroscopicamente completas, divididos en 2 grupos: pre- y posprotocolo, segun se intervinieran antes o despues de la aplicacion de un protocolo estandariza…

Pathology Reporting of Resected Pancreatic/Periampullary Cancer Specimen

Pancreatic specimens have always been a great challenge for surgical pathologists due to their anatomic complexity and the difficulty of becoming familiar with these specimens. However, pancreatic specimens are becoming more and more common in many hospitals because of the improvements in surgical techniques and perioperative care that have dramatically reduced the postoperative mortality rate.

Borderline resectable pancreatic cancer. Challenges and controversies.

Abstract Pancreatic cancer is a dismal disease with an increasing incidence. Despite the majority of patients are not candidates for curative surgery, a subgroup of patients classified as borderline resectable pancreatic cancer can be selected in whom a sequential strategy of neoadjuvant therapy followed by surgery can provide better outcomes. Multidisciplinary approach and surgical pancreatic expertise are essential for successfully treating these patients. However, the lack of consensual definitions and therapies make the results of studies very difficult to interpret and hard to be implemented in some settings. In this article, we review the challenges of borderline resectable pancreatic…

Nonepithelial skin tumors with multinucleated giant cells

Recognition of the different types of multinucleated giant cells in neoplastic and pseudotumoral lesions of the skin may be helpful in the differential diagnosis of these tumors. In this review, we will analyze the different types of multinucleated giant cells that can be found in nonepithelial cutaneous tumors and, more importantly, the clinicopathological context in which they are found. Touton giant cells are typically present in juvenile xanthogranuloma, necrobiotic xanthogranuloma, and some subtypes of xanthomas. Giant cells with a ground glass appearance are typically present in the solitary reticulohistiocytoma and multicentric reticulohistiocytosis. Osteoclast-like cells are found i…

Prognostic Implications of the Standardized Study of Resection Margins in Pancreatic Cancers

Abstract Introduction Involvement of surgical resection margins is a fundamental prognostic factor in pancreatic oncological surgery. However, there is a lack of standardized histopathology definition. The aims of this study are to investigate the real rate of R1 resections when surgical specimens are evaluated according to a standardized protocol and to study its survival implications. Patients and methods One hundred consecutive surgically resected patients with pancreatic ductal adenocarcinoma were included in the study. They were further divided into 2 groups: pre-protocol, evaluated before the introduction of the standardized protocol and post-protocol, analyzed with the standardized p…

Microcystic pseudoglandular plexiform cutaneous neurofibroma

Glandular structures are well documented to appear in peripheral nerve sheath tumors. These epithelial elements are usually present in malignant peripheral nerve sheath tumors although a few cases of glandular benign peripheral nerve sheath tumors have also been described, most of them being schwannomas. A neurofibroma with glands is considered to be a rare type of divergent differentiation, but a neurofibroma containing gland-like or pseudoglandular structures have not, to our knowledge, been described. We report a 33-year-old patient with a well-demarcated dermal neoplasm, composed of neoplastic Schwann cells, perineurial-like cells and fibroblasts in a matrix with collagen fibers and myx…

Prognostic value of SOX2 expression in neuroblastoma.