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Sarcoma arising at the site of a total hip arthroplasty (THA) is uncommon. We present a case report of a patient diagnosed with an osteosarcoma around a ceramic-on-ceramic THA and a narrative literature review of sarcomas around THA. A search of PubMed MEDLINE was performed from inception. Our case report was included in the analysis. A total of 13 studies were included in the review. We report the first case of a sarcoma around a ceramic-on-ceramic hip implant. All cases in the literature reported poor outcomes with an average time from index THA to diagnosis of 9.3 ± 8.2 years. Sarcomas around THA are extremely rare. Despite the rarity of the diagnosis, osteosarcoma must be considered in the differential diagnosis when investigating a periprosthetic mass.

SMARCA4/2 loss in ovarian and lung cancers is associated with chemotherapy resistance. Here, the authors show that SMARCA4/2 deficiency in cancer cells reduces the expression of the ER-Ca2+ channel IP3R3 and subsequently calcium transfer to the mitochondria, which inhibits apoptotic cell death.

A 32-year-old woman with chemorefractory mullerian adenosarcoma showed clinical benefit in response to administration of lenvatinib plus pembrolizumab. In this case report, we describe the course of her illness and her response to this treatment.

Limited literature exists on complications specific to the all-polyethylene tibial component in distal femoral replacement (DFR). Unlike in primary arthroplasty with polyethylene components, polyethylene granuloma has not been reported in DFR with an all-polyethylene tibia. Here, we report 2 cases of polyethylene granuloma in patients with primary bone sarcoma who underwent DFR with an all-polyethylene tibia. Radiologically, evidence of intraosseous granuloma formation and periprosthetic osteolysis was observed at the anterior tibial metaphysis. Both patients underwent an operative debridement of polyethylene granuloma and necrotic tissues, followed by a revision to a long-stem, cemented metal-backed tibia with impacted allograft to fill the defect. Polyethylene granuloma should be considered a differential diagnosis in the presence of a periprosthetic lytic lesion after DFR with an all-polyethylene tibial component.

Bullous pemphigoid is an autoimmune blistering disease that primarily affects the geriatric population. It often presents as urticarial erythematous plaques, which evolve into subepidermal blisters accompanied by pruritus. Although rare, clinical variants of bullous pemphigoid have been documented. We present a rare case of annular bullous pemphigoid in a 50-year-old male and offer a brief review of the literature. Only five other case reports, including three in adults, have described this unusual presentation, which can mimic other autoimmune blistering diseases, including linear IgA bullous dermatosis and pemphigus herpetiformis. Therefore, histopathology and immunologic studies were essential in properly diagnosing this patient. Our case supports that annular blistering lesions can be a clinical variant of bullous pemphigoid.

Necrobiotic xanthogranuloma is a rare non-Langerhans cell histiocytosis with a known association with monoclonal gammopathies and malignant conditions. There is a lack of consensus regarding the management of necrobiotic xanthogranuloma. In this case report, the patient is diagnosed with a long-standing necrobiotic xanthogranuloma limited to the skin. Although all initial investigations were reassuring, the patient remains at a higher risk of developing a malignant condition. The goal of the authors is to highlight the need for clearer investigation and follow-up guidelines.

We report a case of a primary malignant solitary fibrous tumor (SFT) of the urinary bladder in a previously healthy 35-year-old male. The unusual presentation, focal GATA3 expression in the biopsy and the excessive rarity of the entity at the involved location all contributed to a challenging diagnosis, which was finalized with the resection specimen. Review of the literature highlighted the rarity of this tumor but revealed a relatively positive outcome, with no previous reports of disease recurrence. We therefore describe the first report of malignant bladder SFT associated with pulmonary metastases.

Non-small cell lung cancers with inactivating SMARCA4 mutations are currently undruggable. Here, the authors show that the absence of SMARCA4/2 reduces chromatin accessibility at the CCND1 locus, leading to a subsequent reduction in cyclin D1 expression, which promotes vulnerability of these cancers to CDK4/6 inhibition.

32-year-old woman with chemorefractory mullerian adenosarcoma showed clinical benefit in response to administration of lenvatinib plus pembrolizumab. In this case report, we describe the course of her illness and her response to this treatment. [ABSTRACT FROM AUTHOR]