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Overview

What Is Sarcoma Cancer?

Sarcoma cancer is a group of cancers that begins in connective tissues, such as muscle, fat, blood vessels, nerves, and tendons, or in bone. These cancers develop when abnormal cells grow out of control. Sarcoma is not one single disease; it includes many distinct subtypes with different behaviors and treatments. It can affect children or adults, although the specific types and typical ages can vary.

Symptoms

Sarcoma Symptoms

Sarcoma symptoms depend on where the tumor starts, how large it becomes, and whether it develops in soft tissue or bone. Early signs may be subtle and can resemble more common problems. Soft tissue sarcoma symptoms often involve a lump or swelling, while bone tumors may cause pain or difficulty using the affected area.

  • A new or growing lump may feel firm, deep, or fixed in place, although many lumps are not sarcoma.
  • Persistent swelling in an arm, leg, or another body area may occur as a tumor enlarges.
  • Unexplained or continuing pain can be a symptom, particularly when sarcoma begins in bone or presses on nearby structures.
  • Reduced movement, weakness, or difficulty using a limb may develop when a tumor affects muscle, joints, nerves, or nearby tissue.
  • A feeling of fullness, pressure, or swelling in the abdomen can occur with some tumors in the abdominal or pelvic area.
  • Bone pain that persists, worsens at night, or is not explained by an injury should be medically assessed.

When to get checked

Lump assessment matters

Arrange a prompt medical assessment for a lump that is new, enlarging, firm, deep, or painful. These features do not prove sarcoma, but early evaluation can help identify the cause and guide appropriate testing.

Causes

Causes of Sarcoma Cancer

Sarcoma develops when DNA changes allow cells in connective tissue or bone to grow and divide uncontrollably. These changes may affect how cells grow, repair themselves, or die. In many cases, the specific trigger is unknown, so doctors cannot identify one clear cause of the sarcoma.

Risk Factors

Risk Factors for Sarcoma

Having a risk factor does not mean that someone will develop sarcoma. Many people diagnosed with sarcoma have no known risk factor, and most people with the factors below do not develop the disease. These factors are associated with risk rather than being definite causes.

NON-MODIFIABLE FACTORS

Risk may be associated with certain ages, rare inherited syndromes, and a family history of relevant cancers. Genetic counseling may be considered when a personal or family history suggests an inherited condition.

MEDICAL OR ENVIRONMENTAL FACTORS

Associated factors can include previous radiation therapy, chronic lymphedema, and selected occupational or chemical exposures. These factors do not explain every case of soft tissue sarcoma.

Side Effects & Complications

Sarcoma Complications and Treatment Side Effects

Potential complications and side effects

  • Tumor growth can cause pain, swelling, tissue damage, or reduced function in the affected area.
  • A tumor may involve nearby nerves or blood vessels, causing numbness, weakness, circulation changes, or other functional problems.
  • Sarcoma can recur after treatment or spread to the lungs or other organs, causing metastatic sarcoma.
  • Surgery, radiation, chemotherapy, or other soft tissue sarcoma therapy may cause fatigue, nausea, pain, or infection risk.
  • Some treatments can affect fertility, sexual health, body image, or long-term physical function.
  • Lymphedema may develop after surgery or radiation, particularly when lymphatic vessels or lymph nodes are affected.
  • Rehabilitation may be needed to restore strength, movement, balance, or independence after treatment.

Treatment safety

Report concerning changes promptly

Side effects vary by treatment and should be discussed with the oncology team. Contact the team promptly about fever, sudden worsening pain, breathing difficulty, new weakness, confusion, or other new neurologic symptoms.

Diagnosis & Staging

How Sarcoma Is Diagnosed and Staged

Evaluation usually begins with a medical history and physical examination of the lump or other symptoms. Depending on the suspected location, tests may include ultrasound, MRI, CT, or X-ray imaging. These studies help show the tumor’s size, depth, location, and relationship to nearby structures, but imaging alone cannot confirm sarcoma.

Biopsy and pathology

Staging factorWhat it describes
Primary tumorSize, depth, and location of the original tumor
GradeHow abnormal and rapidly growing the tumor cells appear
SpreadWhether cancer involves lymph nodes or distant organs

Treatment Options

Sarcoma Treatment Options

SURGERY

Surgery aims to remove the tumor with an appropriate margin while preserving function when possible. The operation depends on the tumor’s size, location, subtype, and relationship to nearby structures.

RADIATION THERAPY

Radiation may be given before or after surgery for selected tumors, or used to help control symptoms when a tumor cannot be completely removed.

DRUG TREATMENT

Chemotherapy, targeted therapy, immunotherapy, or a clinical trial may be considered when appropriate for the sarcoma subtype, stage, and molecular features.

SUPPORTIVE CARE

Supportive care addresses pain, mobility, nutrition, emotional health, and rehabilitation throughout treatment and recovery.

Treatment plans are individualized according to the sarcoma type, tumor location, stage, overall health, and personal goals. Metastatic sarcoma may require systemic treatment, local treatment, symptom control, or consideration of a clinical trial, sometimes in combination.

Specialist care

Treatment planning is highly individualized

When feasible, seek evaluation from a multidisciplinary team with sarcoma expertise before biopsy or definitive treatment. Specialist planning can help coordinate imaging, biopsy, surgery, medicines, radiation, and rehabilitation.

Outlook and Prognosis

Outlook and Prognosis for Sarcoma

The prognosis for sarcoma differs widely between people. Important factors include the subtype, tumor size and location, grade, stage, response to treatment, age, and overall health. A specialist can explain what these factors mean for an individual more accurately than a general survival estimate.

Varies widely

Sarcoma subtype

Important

Tumor stage and spread

Relevant

Grade and tumor location

Individual

Treatment response and overall health

Survivorship & Follow-up

Sarcoma Survivorship and Follow-Up

Follow-up schedules depend on the sarcoma subtype, stage, treatment, and risk of recurrence. Visits may include physical examinations, symptom reviews, and periodic imaging based on the treating team’s plan. Follow-up also helps identify and manage lasting effects of treatment.

  • Monitoring for recurrence may involve scheduled examinations and imaging, along with reporting new or changing symptoms.
  • Pain, swelling, or lymphedema can often be addressed with medical care, compression, exercise, or rehabilitation.
  • Physical therapy may help restore strength, movement, balance, and daily function.
  • Fertility, sexual health, and body-image concerns can be discussed with appropriate specialists.
  • Emotional support, counseling, peer groups, and mental health care can help with anxiety, adjustment, and fear of recurrence.

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