A Rare Occurrence of Primary Gastric Ewing Sarcoma.

Ewing sarcoma (ES) is a rare malignancy that typically occurs within the skeletal system but can also develop extraskeletally. Extraskeletal ES typically presents paraspinally, in the limbs, and retroperitoneum. Rarely, it presents as a primary gastric ES.

DNA Mutational and Copy Number Variation Profiling of Primary Craniofacial Osteosarcomas by Next-Generation Sequencing.

Background: Craniofacial osteosarcomas (CFOS) are uncommon malignant neoplasms of the head and neck with different clinical presentation, biological behavior and prognosis from conventional osteosarcomas of long bones. Very limited genetic data have been published on CFOS.

Methods: In the current study, we performed comprehensive genomic studies in 15 cases of high-grade CFOS by SNP array and targeted next generation sequencing.

Ancient Schwannoma with Hemorrhagic Degeneration Causing Chronic Intramuscular Hematoma: A Case Report.

Introduction: The value of this manuscript is that it highlights a common diagnostic challenge facing orthopedic surgeons, involving the reality that both benign and malignant soft-tissue tumors can present as large cystic masses masquerading as a hematoma. This is the first report of its kind to describe a schwannoma presenting as such a large hematoma in the thigh.

Case Presentation: A 64-year-old male presented with 2 days of worsening pain over a left posterior thigh mass that was enlarging for 12 years.

Paratesticular leiomyosarcoma with metastasis to the extremities and lungs.

Paratesticular leiomyosarcoma is a rare malignant tumor deriving from the smooth muscle of structures surrounding the testes, including the epididymis or scrotum. With few cases of genitourinary soft tissue sarcomas reported in the literature, little is known about progression, management, and treatment. Herein, we report a case of metastatic paratesticular leiomyosarcoma in a 47-year-old male with no past urological history.

Intraosseous hibernoma: Two case reports and a review of the literature.

Intraosseous hibernomas are exceedingly rare tumors with only 35 cases reported worldwide. They are composed of vestigial brown adipose tissue and require biopsy and pathologic analysis for definitive diagnosis. Given their propensity to mimic more insidious malignant neoplasms, early and accurate identification may spare the patient both anxiety and invasive therapeutic interventions.

HIV-Associated "Double-Hit" Lymphoma of the Tonsil: A First Reported Case.

Double-hit lymphoma (DHL) is a unique subtype of non-Hodgkin lymphoma characterized by atleast two rearrangements involving MYC, BLC2, and/or BCL6. These lymphomas are uncommon and aggressive, responding poorly to typical chemotherapy regimens. Lymphomas rarely arise from the oral cavity or tonsils, and those presenting as a neck mass are predominantly diffuse large B-cell lymphoma.

Next-Generation Sequencing in 305 Consecutive Patients: Clinical Outcomes and Management Changes.

Purpose: Next-generation sequencing (NGS) is increasingly used to identify actionable mutations for oncology treatment. We examined the results and use of NGS assays at our institution.

Patients And Methods: We retrospectively reviewed the medical records of 305 consecutive patients who had NGS testing of tumor samples from March 2014 to April 2017.