common/sarcoma

The therapeutic strategies proposed currently for bone sarcomas are based on neo-adjuvant chemotherapy, delayed en-bloc wide resection, and adjuvant chemotherapy. Unfortunately, bone sarcomas are characterized by high rates of poor drug response, with a high risk of drug resistance, local recurrence

A case of botryoid sarcoma of the common bile duct in a 4-year-old girl was reported. Electron microscopic examination disclosed that the neoplasm consisted of three types of cells: polygonal, elongated, and small cells. The former two contained moderate to large amounts of poorly developed

There are five known human retroviruses: human T-lymphotropic virus-I (HTLV-I), HTLV-II, HTLV-V, human immunodeficiency virus-1 (HIV-1), and HIV-2. These are related to animal lentiviruses. The simian retroviruses, simian T-lymphotropic virus-I (STLV-I) and STLV-III are related closely to HTLV-I and

Osteosarcoma, Ewing sarcoma, and rhabdomyosarcoma are the most common malignant musculoskeletal tumors in children and adolescents. Today, most patients can be cured. Numerous factors have contributed to improved outcome for these patients over the past several decades. These include

Two major xenobiotic metabolizing sub-families of cytochrome P450 (cytochrome P450 1A and cytochrome P450 3A) have been identified in soft tissue sarcomas. Cytochrome P450 1A was present in 70 per cent and cytochrome P450 3A was present in 78 per cent of tumours, respectively. A high proportion (86

The expression of tumor-associated transplantation antigens (TATA) by 3 different murine melanomas was examined. A comparison was made between different modes of inducing tumor-rejection activity, including immunization with irradiated cells from tissue culture lines, with irradiated cells from

BACKGROUND Compared with the general population, carriers of germline mutations in RB1 who survive retinoblastoma (i.e., hereditary retinoblastoma survivors) are at increased risk of early-onset second cancers, particularly sarcomas, brain tumors, and melanoma. However, their risks for the

Hepatic sarcomas of childhood, which appear heterogeneous by standard morphologic criteria, pose challenging diagnostic and nosologic problems to the pediatric surgical pathologist. To identify features of these tumors that might help to clarify their origin and histologic classification, we studied

Ewing's sarcomas express chimeric transcription factors resulting from a fusion of the amino terminus of the EWS gene to the carboxyl terminus of one of five ETS proteins. While the majority of tumors express EWS/FLI1 fusions, some Ewing's tumors contain variant chimeras such as EWS/ETV1 that have

Previous work has shown that the metastatic potential of RSV-transformed fibroblasts is correlated with the ability to form colonies in 0.6% ("hard") agar. Metastatic subclones were selected by this property from the non-metastasizing fibrosarcoma B77-313 line. A marker chromosome was found at high

A 55-year-old man presented with jaundice and edema of the right leg. Tests of the peripheral blood and bone marrow showed leukocytopenia with 6% blasts and 38.3% of myeloperoxidase-positive blasts, respectively. Computed tomography (CT) scanning disclosed thickening of the common bile duct wall.

Myeloid sarcoma is a rare manifestation of myeloproliferative disorder defined as an extramedullary mass composed of myeloid precursor cells. A 9-month old, female, common marmoset (Callithrix jacchus) had increased respiratory effort. A complete necropsy with histology and immunohistochemistry was

THE GASTROINTESTINAL (GI) TRACT IS A MAJOR SITE OF DISEASE IN HIV INFECTION: almost half of HIV-infected patients present with GI symptoms, and almost all patients develop GI complications. GI symptoms such as anorexia, weight loss, dysphagia, odynophagia, abdominal pain, and diarrhea are frequent

BACKGROUND Sarcomatoid carcinoma is an extremely rare lesion in the common bile duct (CBD). UNASSIGNED We present a case of sarcomatoid carcinoma of the distal CBD in a 51-year-old woman who presented with jaundice and abdominal pain. Whipple's operation was performed successfully. Microscopically,