What is Fibrosarcoma?

Fibrosarcoma is a rare type of cancer that originates in the fibrous connective tissues of the body, such as the muscles, tendons, or ligaments. The causes of fibrosarcoma are not well understood, but there are certain risk factors that may increase the likelihood of developing this condition.


Fibrosarcoma develops in the fibrous tissue of the body. The specific symptoms can vary depending on the location and size of the tumor. Some common symptoms of fibrosarcoma may include:

1. Formation of a firm mass or lump: The most noticeable symptom of fibrosarcoma is the presence of a painless lump or mass. It may grow rapidly over time.

2. Localized pain or tenderness: The tumor may cause pain or discomfort in the affected area.

3. Limited range of motion: If the tumor develops in a joint or near a joint, it may restrict movement and cause stiffness.

4. Swelling: The affected area might become swollen due to the tumor.

5. Fatigue: In later stages, fibrosarcoma can cause fatigue, weakness, and weight loss.

6. Malaise: A general feeling of unwellness or a vague sense of unease can be experienced.

It is important to note that these symptoms can also be attributed to other conditions, and a proper medical examination and diagnosis are necessary for accurate identification of fibrosarcoma.

General causes:

1. Exposure to radiation: Previous radiation therapy, especially during childhood, may increase the risk of developing fibrosarcoma.

2. Genetic factors: Some genetic conditions, such as neurofibromatosis type 1 and Gardner syndrome, have been associated with an increased risk of fibrosarcoma.

3. Environmental factors: Certain chemicals and toxins present in the environment, such as vinyl chloride and arsenic, have been linked to fibrosarcoma development.

Molecular causes:

Several molecular alterations have been identified in fibrosarcoma, including genetic mutations and chromosomal rearrangements. These changes can affect the regulation of cell growth, division, and apoptosis (programmed cell death). Specific gene mutations frequently found in fibrosarcoma include TP53, CDKN2A, and RB1.


The treatment of fibrosarcoma generally involves a multidisciplinary approach, combining surgery, radiation therapy, and chemotherapy depending on the extent and location of the tumor. The primary treatment modality is surgical removal of the tumor, with wide margins to ensure complete excision. Radiation therapy may be used before or after surgery to target the remaining tumor cells and decrease the risk of recurrence. Chemotherapy is often utilized in cases of metastatic or recurrent fibrosarcoma, but its effectiveness is limited.


The prognosis of fibrosarcoma depends on various factors, including the tumor size, location, grade, and stage at the time of diagnosis. Generally, fibrosarcomas have a poorer prognosis compared to other types of soft tissue sarcomas. The prognosis is better for localized tumors that can be completely removed through surgery. However, if the tumor has spread to nearby lymph nodes or distant organs, the prognosis is generally worse. Regular follow-up and close monitoring are essential to detect any signs of recurrence or metastasis.

More Information

Fibrosarcoma is a rare and aggressive form of soft tissue cancer defined as a neoplasm composed of fibroblasts with variable collagen production. It primarily originates in the connective tissues, such as tendons, ligaments, and muscles, making early detection and precise treatment crucial for improving patient outcomes[1]. It is a highly malignant tumor of mesenchymal cell origin, characterized by its propensity to infiltrate and destroy healthy tissues. Fibrosarcoma can occur as a soft-tissue mass or as a primary or secondary bone tumor[3]. The mainstay of treatment for fibrosarcoma has been complete excision with an adequate margin, and the prognosis varies, with between 40% and 60% of people who have fibrosarcoma being alive five years after diagnosis[5].


[1] https://www.ncbi.nlm.nih.gov/books/NBK560759/
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5732833/
[3] https://emedicine.medscape.com/article/1257520-overview
[4] https://www.sciencedirect.com/topics/pharmacology-toxicology-and-pharmaceutical-science/fibrosarcoma
[5] https://my.clevelandclinic.org/health/diseases/22009-fibrosarcoma

Guss Rigne

Guss Rigne is, in another life, an English actor, director, and producer known for his roles on stage, television, and film. He joined the News i8 team in 2023.

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