The role of radiotherapy and chemotherapy in extraskeletal myxoid chondrosarcoma.

Background: Extraskeletal myxoid chondrosarcoma (EMC) is an extremely rare subtype of sarcoma characterized by NR4A3 gene rearrangement. Despite being considered slowly progressive sarcomas, EMCs tend to have local recurrences and distant metastases in the late stages. This study aimed to investigate the prognostic factors of EMCs, especially the effect of (neo)adjuvant radiotherapy or chemotherapy on localized EMCs and chemotherapy on advanced-stage EMCs.

Is surgical resection of the primary site associated with longer survival in patients with metastatic chondrosarcoma at initial diagnosis?

Purpose: Patients with metastatic chondrosarcoma at presentation have a poor prognosis. Owing to the lack of sensitivity to chemotherapy and radiotherapy, surgical resection is the mainstay of treatment of localized chondrosarcoma. The aim of this study was to investigate whether surgical resection of the primary site was associated with improved survival in patients with metastatic chondrosarcoma at presentation.

Calcium response via CRAC channels in human synovial cells induced by shear stress in rheumatoid arthritis.

The role of calcium release-activated calcium channel (CRAC) inhibitors in the pathogenesis of rheumatoid arthritis (RA) is unclear. We focused on stromal interaction molecule 1 (STIM1) and Ca release-activated channel regulator 2 A (CRACR2A), which participate in CRAC activation, to understand the signaling mechanism of human RA fibroblast-like synovial (FLS) cells in response to shear stress (SS). Human normal and RA FLS cell cultures were studied.

Predicting survival outcomes in dedifferentiated chondrosarcoma: a prognostic factor analysis from a National Registry.

Introduction: Dedifferentiated chondrosarcoma (DDCS) is a high-grade subtype of chondrosarcoma with a poor prognosis. Treatment for localized DDCS generally involves wide resection; the effectiveness of adjuvant radiotherapy and chemotherapy is questionable. This research was designed to find prognostic factors for DDCS and evaluate the impact of adjuvant therapies on localized cases.

Wide surgical margins may be necessary to reduce recurrence and mortality in patients with localized periosteal chondrosarcoma: retrospective analysis of twenty three patients and literature meta-analysis.

Purpose: Periosteal chondrosarcoma (PCS) is the rarest subtype of chondrosarcoma and is recognized as a low-grade malignant tumour, reported to have an 88% ten year overall survival rate. The relationship between surgical margins and clinical outcome is inconsistent; some authors claim that PCS can be successfully treated with marginal resection and others report more local recurrence and distant metastasis with marginal compared to wide resection. This study was intended to report the treatment and prognosis of localized PCS patients from the Japanese National Bone and Soft Tissue Tumor Registry database and to perform a systematic review of the literature to determine the relationship between surgical margins and rates of local recurrence, distant metastasis, and mortality.

Prognostic factors for mesenchymal chondrosarcoma.

Introduction: Mesenchymal chondrosarcoma (MCS) is a malignant, biphasic, high-grade, primitive mesenchymal tumor that has a well-differentiated, organized hyaline component. MCS has a poor prognosis, and treatment recommended for localized MCS is based on wide resection while controversy remains regarding the efficacy of adjuvant chemotherapy and radiotherapy. In this study, we aimed to investigate the prognostic factors of MCS, especially the efficacy of adjuvant chemotherapy and radiotherapy for localized MCS.

Coverage of lateral soft tissue defects with sartorius muscle flap after distal femoral replacement for malignant bone tumors.

Introduction: To prevent infection after limb-sparing surgery for primary malignant bone tumors, it is important to cover the megaprosthesis with muscle tissue that has sufficient blood flow. Coverage with a lateral gastrocnemius flap has been reported in cases of distal femoral replacement in which the vastus lateralis and vastus intermedius muscles have been resected; however, the risk of peroneal nerve palsy is reportedly high because the muscle flap passes near the peroneal head. This study was performed to examine the postoperative outcomes of patients with primary malignant bone tumors of the distal femur who underwent wide resection (including the vastus lateralis and vastus intermedius muscles) followed by reconstruction with a megaprosthesis and coverage of the lateral side of the prosthesis with a sartorius muscle flap.

Roles of lysophosphatidic acid (LPA) receptor-mediated signaling in cancer cell biology.

Lysophosphatidic acid (LPA) is a simple lipid which is endogenously synthesized from lysophosphatidylcholine (LPC) by autotaxin (ATX). LPA mediates a variety of cellular responses through the binding of G protein-coupled LPA receptors (LPA to LPA). It is considered that LPA receptor-mediated signaling plays an important role in the pathogenesis of human malignancy.

Response rate specific to bone metastasis of various cancers for immune checkpoint inhibitors: a systematic review.

Purpose: Immune checkpoint inhibitors (ICIs) have improved the prognosis of patients with cancer, such as melanoma, renal cell carcinoma, head and neck cancer, non-small cell lung cancer (NSCLC), and urothelial carcinoma. The extension of life expectancy has led to an increased incidence of bone metastases (BM) among patients with cancer. BM result in skeletal-related events, including severe pain, pathological fractures, and nerve palsy.

Revisiting 'Hallmarks of Cancer' In Sarcomas.

There is no doubt that anyone who has participated in cancer care or research has once read the 'Hallmarks of Cancer' papers published by Hanahan and Weinberg in 2001 and 2011. They initially defined the six qualities of cancer cells as cancer hallmarks in 2001, but expanded that to 11 as a next generation in 2011. In their papers, they discussed the potential treatment strategies against cancer corresponding to each of the 11 hallmarks, and to date, proposed therapies that target genes and signaling pathways associated with each of these hallmarks have guided a trail that cancer treatments should take, some of which are now used as standard in clinical practice and some of which have yet to progress that far.

A Systematic Review of Adjuvant Chemotherapy in Localized Dedifferentiated Chondrosarcoma.

Dedifferentiated chondrosarcoma (DDCS) is a high-grade subtype of chondrosarcoma with the bimorphic histological appearance of a conventional chondrosarcoma component with abrupt transition to a high-grade, non-cartilaginous sarcoma. DDCS can be radiographically divided into central and peripheral types. Wide resection is currently the main therapeutic option for localized DDCS.

Reoperation after surgery for bone metastasis of renal cell carcinoma.

Background And Objective: The prognosis of metastatic renal cell carcinoma (RCC) has markedly improved with the advent of molecular targeted therapies and immune checkpoint inhibitors. However, the therapeutic response in patients with bone metastasis remains low; therefore, surgery still plays a significant role in treatment of bone metastasis. It is important to maintain quality of life for patients with bone metastasis from RCC and avoid reoperation after surgery for bone metastasis.

Giant cell tumor of bone with secondary aneurysmal bone cyst does not have a higher risk of local recurrence.

Background: Fluid-fluid levels (FFLs) is found in 10%-16% of giant cell tumor of bone (GCTB), and the presence of FFLs raises the suspicion of GCTB with secondary aneurysmal bone cyst (ABC), which can lead to increased intraoperative bleeding and, blurring the operative field, be associated with a risk of local recurrence. The first objective of this study is to determine whether secondary ABC is associated with a higher risk of local recurrence after curettage in patients with GCTB of the extremities. The second objective of this study is to investigate the sensitivity, specificity, positive predictive value, and negative predictive value of the presence of FFLs detected on magnetic resonance imaging (MRI) to diagnose secondary ABC associated with GCTB.

5-Aminolevrinic Acid Exhibits Dual Effects on Stemness in Human Sarcoma Cell Lines under Dark Conditions.

5-aminolevulinic acid (ALA) is used for tumor-targeting phototherapy because it is converted to protoporphyrin IX (PPIX) upon excitation and induces phototoxicity. However, the effect of ALA on malignant cells under unexcited conditions is unclear. This information is essential when administering ALA systemically.

Reconstruction after Talar Tumor Resection: A Systematic Review.

This systematic review investigated the functional outcomes and complications of reconstruction methods after talar tumor resection. A systematic search of PubMed, Embase, and the Cochrane Central Register of Controlled Trials databases identified 156 studies, of which 20 (23 patients) were ultimately included. The mean Musculoskeletal Tumor Society scores in the groups reconstructed using tibiocalcaneal fusion ( = 17), frozen autograft ( = 1), and talar prosthesis ( = 5) were 77.

Outcome of re-operation for local recurrence following pre-operative denosumab administration and curettage for giant cell tumour of bone with difficult joint preservation.

Purpose: Denosumab enables joint-sparing surgery (curettage) and surgical downstaging in patients with giant cell tumour of bone (GCTB), where joint preservation is not possible. However, denosumab treatment causes osteosclerosis of the lesion, making it difficult to curet the lesion, leaving the tumour behind, and increasing the local recurrence rate. We performed a three-centre retrospective study to investigate the postoperative local re-recurrence rate, joint preservation status, and functional outcomes of locally recurrent lesions after preoperative denosumab treatment and curettage in patients with difficult joint preservation.

Outcome of Reoperation for Local Recurrence Following En Bloc Resection for Bone Giant Cell Tumor of the Extremity.

En bloc resection is typically performed to treat giant cell tumors of bone (GCTB), particularly when curettage can be challenging owing to extensive bone cortex destruction with soft tissue extension. Few reports have addressed the clinical outcomes after reoperation for local recurrence in patients with GCTB who underwent en bloc resection. In this multicenter retrospective study, we investigated local recurrence, distant metastasis, malignant transformation, mortality, and limb function in patients treated for local recurrence following en bloc resection for GCTB.