Sarcoma

Breast desmoid-type fibromatosis is a rare tumor that can closely mimic breast carcinoma on imaging studies. Histopathological evaluation is essential for establishing the diagnosis. Because positive surgical margins have been associated with an increased risk of local recurrence, careful postoperative follow-up is warranted.

This case highlights a rare manifestation of pulmonary PC with metastasis to the small bowel causing obstruction, an uncommon but important differential diagnosis in lung cancer patients presenting with abdominal symptoms. Early recognition is critical, as atypical metastatic patterns may delay diagnosis and impact clinical management.

A diagnostic algorithm combining endometrial carcinoma molecular classification, SWI/SNF protein testing, and thorough sampling is proposed. This study expands the clinicopathological and molecular spectrum of SMARCA4-deficient uterine tumours, underscoring the need for entity-specific management strategies.

The median time to progression was 7 months (range 2-16.5 months). The existence of a parallel relationship between the lesion and the ipsilateral inguinal region, as well as the vascular ball sign, is helpful in differentiating testicular ERMS from testicular seminoma.

This case highlights a critical diagnostic pitfall: primary EAS can diffusely express cytokeratins. More importantly, our findings challenge the traditional view that MYC amplification is exclusive to secondary, radiation-associated angiosarcomas. We propose that MYC amplification can act as a driver in primary EAS and may serve as a biomarker for aggressive clinical behavior.

CYP26A1 expression was most frequent in giant cell tumors of bone. While also detected in a subset of other bone tumors, expression was limited or absent in most benign and malignant lesions, and entirely absent in normal bone tissue. These findings provide novel descriptive insight into CYP26A1 distribution and support further investigation into its role in retinoid-related pathways in bone tumor biology.

Co-administration of TGF-β and miR-16-1-3p markedly increased cisplatin sensitivity in wild-type U2OS cells and reduced tumor nodule volume, Ki67 expression, and metastasis in the chicken chorioallantoic membrane model. Collectively, these findings suggest that miR-16-1-3p biases TGF-β signaling output toward anti-growth responses, while attenuating pro-migratory effects through MDM2 inhibition and p53 stabilization, providing a mechanistic rationale for improving therapeutic responses in osteosarcoma.

Moreover, these MDM2-recruiting transcriptional/epigenetic machinery degraders (termed MDM2-TEMADs) consistently impair the homologous recombination repair pathway and confer synthetic lethality with PARP inhibitors. Together, this work elucidates MDM2's central role in pediatric sarcoma pathogenesis and presents dCDK9-010 as a first-in-class, MDM2-recruiting P-TEFb degrader and an exemplary MDM2-TEMAD that enables precise targeting of MDM2-dependent oncogenic transcriptional addiction.

By applying the pathway inhibitor LY294002, it was confirmed that the PI3K/Akt pathway is crucial for osteosarcoma proliferation. This study confirms that PYCR1 drives osteosarcoma cell proliferation and migration through three key mechanisms: regulating downstream genes, inhibiting ferroptosis, and activating the PI3K/Akt signaling pathway.

Outcomes appear to be influenced by an interplay of disease context, clonal architecture, and therapeutic strategy rather than individual mutations alone, underscoring the need for integrated molecular profiling and prospective studies to guide management. This study highlights that MS with MR mutations may follow different cellular pathways to evolution.

Later on, confirmation with histopathology and IHC, the patient underwent complete excision with hemi-mandibulectomy followed by adjuvant radiation therapy. This case emphasises the diagnostic and therapeutic approach for ASPS in the buccal mucosa of a young child.

Subcutaneous ESOS is rare and diagnostically challenging. This case highlights the importance of imaging, histopathology, immunohistochemistry, and multidisciplinary management, particularly in resource-limited settings.