Sarcoma

All five bisphenols exhibited high binding affinity for BCAT1 in structural simulations, and pan-cancer analysis revealed BCAT1 overexpression in multiple solid tumors, correlating with unfavorable clinical outcomes. Collectively, these findings suggest that bisphenols may act as potential regulators of BCAT1, with implications for tumor progression, though further experimental validation is required to confirm the actual enzymatic activity modulation and carcinogenic effects.

Early detection of pathogenic mutations, appropriate surgical intervention, and long-term follow-up are essential to reduce complications. Multidisciplinary care and emerging targeted therapies, such as MEK inhibitors, may further improve management and prognosis for patients with complex NF1 manifestations.

This report, representing the first documented case of LLMS from Central Asia, contributes to the limited global experience with this rare tumor. Our review identified four additional LLMS cases published between 2021 and 2024, totaling five recent reports including the present case. Collectively, these demonstrate persistent male predominance, glottic and supraglottic predilection, and survival outcomes consistent with previous observations. Complete surgical excision remains the cornerstone of therapy, while multidisciplinary-guided adjuvant treatment may benefit selected high-grade or high-risk patients. Continued accumulation and molecular characterization of cases are needed to refine prognostic assessment and optimize management strategies.

This case highlights diagnostic pitfalls in cytokeratin-positive pleomorphic chest-wall tumors and the limitations of core biopsy. En bloc resection with rigid reconstruction is feasible, while positive margin status warrants multidisciplinary consideration of adjuvant local therapy and structured surveillance.

Despite palliative chemotherapy (cyclophosphamide and vincristine), the patient experienced rapid tumor recurrence and progressive clinical deterioration, culminating in death three weeks post-intervention. In resource-limited settings, where advanced molecular diagnostics are scarce, maintaining a high index of clinical suspicion and ensuring multidisciplinary management are paramount. Early histopathological confirmation is critical to addressing the rapid progression and therapeutic resistance characteristic of this malignancy.

Notably, the E3 ubiquitin ligase TRIM37 (tripartite motif containing 37) facilitates the polyubiquitination of lysine residues at position 116 of PFN1, which serves as a critical recognition motif for the cargo receptor SQSTM1/p62 (sequestosome 1), which is pivotal for the subsequent autophagic degradation of ORF44. Overall, our findings revealed a previously uncharacterized antiviral function of PFN1, highlighting its potential as a novel therapeutic avenue for the treatment of KSHV-associated malignancies.

CXCR4 promotes osteosarcoma cell invasiveness through upregulation of MMP9. The CXCR4-MMP9 axis may represent a potential therapeutic target to limit osteosarcoma progression and metastasis.

PRAME is an antigen that has been described in primary cutaneous and metastatic melanomas and has become a useful ancillary immunohistochemical marker, particularly when all others are negative. We present a patient with metastatic melanoma to the left atrium with loss of melanocytic differentiation, gain of a rhabdomyosarcomatous differentiation, and a diffuse and strong positivity for PRAME.

Adjuvant immunotherapy has transformed the management of high-risk resected ccRCC, with pembrolizumab demonstrating improvements in DFS and OS...Additional biomarkers including sarcomatoid differentiation, specific genomic drivers (PBRM1, BAP1, VHL), circulating tumor DNA, epigenetic signatures, and systemic inflammatory markers, provide complementary insights into tumor biology and host-tumor interaction. Although none of these biomarkers are currently validated for routine clinical decision-making, integrative models combining clinicopathologic and molecular features may enable more precise selection of patients for adjuvant immunotherapy and help reduce overtreatment in localized ccRCC.

Definitive diagnosis was achieved following wide surgical excision, with histopathological and immunohistochemical analysis confirming MM (strongly positive for S100, Melan-A, and SOX10). This case highlights that MM must be considered in the differential diagnosis of atypical cystic soft tissue lesions, even in anatomically unexpected locations, especially in patients with predisposing conditions such as NF-1 and affirms the indispensable integration of multimodality imaging with histopathological and immunohistochemical correlation in resolving diagnostically challenging soft tissue masses.

This phenomenon was evidenced by the following indicators: reduced clone formation, increased cell apoptosis, cell cycle arrest, as well as the inhibition of tumor cell proliferation. Taken together, our study revealed that shepherdin not only modulates the biological behavior of RMS cells but also enhances their sensitivity to X-ray irradiation, demonstrating its potential as an effective therapeutic strategy for RMS.

This updated review synthesizes current knowledge of DICER1 biology, the historical evolution of the syndrome, the distinctive clinicopathologic features of associated tumors, provides a practical diagnostic algorithm to guide pathologists in recognizing sentinel lesions and initiating germline testing, and recent advances in the study of this syndrome and the DICER1 gene. By integrating molecular mechanisms with evolving clinical practice, this article aims to equip diagnostic pathologists and multidisciplinary teams with diagnostic tools and correlations for the detection and management of DICER1 syndrome.