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Rous Sarcoma Virus (RSV) and Cancer01:03

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Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
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Establishment of a Primary Culture of Patient-derived Soft Tissue Sarcoma
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Distal Upper Extremity Sarcoma Epidemiology: A Single-Institution Review.

Kevin Y Chen1, Seth Ahlquist2, Christopher Gajewski2

  • 1University of California, San Francisco, USA.

Hand (New York, N.Y.)
|December 12, 2025
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Upper extremity sarcomas are aggressive and diverse. Small tumors may present with indolent symptoms, challenging current biopsy guidelines for early detection and management of these challenging upper limb cancers.

Keywords:
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Area of Science:

  • Orthopedic Oncology
  • Musculoskeletal Tumors
  • Sarcoma Research

Background:

  • Extremity sarcoma management guidelines are often based on lower extremity data.
  • Upper extremity sarcomas (forearm, wrist, hand, fingers) pose unique challenges due to smaller size and proximity to neurovascular structures.

Purpose of the Study:

  • To describe the presenting characteristics of upper extremity sarcomas.
  • To evaluate management challenges and outcomes for these tumors.

Main Methods:

  • Retrospective review of 119 sarcoma cases from 72 patients with upper extremity specimens (2015-2022).
  • Analysis of demographic and tumor-specific characteristics.
  • Collection of survival data (recurrence, metastasis) for patients with ≥6 months follow-up.

Main Results:

  • Undifferentiated pleomorphic sarcoma (29%) and myxofibrosarcoma (24%) were most common.
  • 36% developed metastasis; 32% had local recurrence.
  • Tumor size (<5 cm) did not correlate with metastasis or recurrence risk.

Conclusions:

  • Upper extremity sarcomas are a heterogeneous, aggressive group.
  • Current biopsy guidelines may miss many upper extremity sarcomas due to small size and subtle symptoms.
  • Further research is needed for tailored diagnostic and management strategies.