What is DSRCT? Symptoms, Causes, & Treatment

DSRCT stands for Desmoplastic Small Round Cell Tumor, a rare and aggressive type of cancer that primarily affects young people. This uncommon cancer typically develops in the abdomen, particularly in the peritoneum (the lining of the abdominal cavity), though it can occasionally appear in other parts of the body.

While DSRCT is indeed rare, affecting fewer than 200 people worldwide each year, understanding this condition can help you recognize potential symptoms and know when to seek medical attention. Most cases occur in teenagers and young adults, with males being affected about four times more often than females.

What is DSRCT?

DSRCT is a soft tissue sarcoma that belongs to a group of cancers called small round cell tumors. The tumor gets its name from two key characteristics: it contains small, round cancer cells, and it's surrounded by dense fibrous tissue called desmoplastic stroma.

This cancer typically grows as multiple masses throughout the abdominal cavity rather than as a single tumor. The masses can range in size and often spread along the peritoneal surfaces, which is why it's sometimes called a "peritoneal sarcomatosis."

What makes DSRCT unique is its specific genetic makeup. The cancer cells contain a characteristic chromosomal translocation that creates an abnormal fusion protein, which drives the tumor's growth and aggressive behavior.

What are the symptoms of DSRCT?

The early symptoms of DSRCT can be quite subtle and may develop gradually over weeks or months. Many people initially dismiss these signs as minor digestive issues or stress-related problems.

The most common symptoms you might experience include:

• Persistent abdominal pain or discomfort that doesn't go away with rest
• Progressive abdominal swelling or bloating that worsens over time
• A feeling of fullness even after eating small amounts
• Unexplained weight loss despite normal or increased appetite
• Nausea and vomiting, especially after meals
• Changes in bowel habits, including constipation or difficulty passing stool
• Fatigue that doesn't improve with rest
• Loss of appetite

In more advanced cases, you might notice a palpable mass in your abdomen that you can feel through your skin. Some people also experience shortness of breath if fluid accumulates in the abdominal cavity, a condition called ascites.

It's important to remember that these symptoms can occur with many different conditions, most of which are much more common and less serious than DSRCT. However, if you're experiencing several of these symptoms persistently, it's worth discussing them with your healthcare provider.

What causes DSRCT?

The exact cause of DSRCT remains largely unknown, which can feel frustrating when you're trying to understand why this cancer develops. What we do know is that DSRCT results from a specific genetic change that occurs randomly in certain cells.

This genetic change involves a translocation between chromosomes 11 and 22, creating an abnormal fusion gene called EWSR1-WT1. This fusion gene produces a protein that disrupts normal cell growth and division, leading to the development of cancer cells.

Unlike some other cancers, DSRCT doesn't appear to be linked to:

• Inherited genetic conditions or family history
• Environmental exposures or lifestyle factors
• Previous radiation or chemotherapy treatments
• Viral infections
• Diet or exercise habits

The genetic change that causes DSRCT appears to be a random event that happens during cell division. This means that developing DSRCT is not something that could have been prevented through different choices or behaviors.

When to see a doctor for DSRCT symptoms?

You should consider seeing your doctor if you're experiencing persistent abdominal symptoms that last more than two weeks, especially if they're getting progressively worse. While these symptoms are much more likely to be caused by common conditions, it's always better to have them evaluated.

Seek medical attention more urgently if you experience:

• Severe, sudden abdominal pain
• Rapid abdominal swelling over days rather than weeks
• Vomiting that prevents you from keeping food or liquids down
• Signs of bowel obstruction, such as inability to pass gas or have bowel movements
• Significant unexplained weight loss (more than 10 pounds without trying)
• Difficulty breathing along with abdominal swelling

Remember that your healthcare provider is there to help you sort through concerning symptoms. They can perform the appropriate tests to determine what's causing your symptoms and provide you with the right treatment plan.

What are the risk factors for DSRCT?

DSRCT has very few identifiable risk factors, which is both reassuring and somewhat puzzling for medical researchers. The cancer appears to develop randomly rather than being associated with controllable risk factors.

The main risk factors that have been identified include:

• Age: Most cases occur in people between 10 and 30 years old, with peak incidence in the late teens and early twenties
• Sex: Males are affected about four times more often than females
• No known hereditary pattern: DSRCT doesn't appear to run in families

Unlike many other cancers, DSRCT is not associated with smoking, alcohol use, diet, exercise, occupational exposures, or previous medical treatments. This can actually be somewhat comforting to know, as it means there likely wasn't anything you could have done differently to prevent it.

The rarity of this cancer also means that even people in the highest risk groups (young males) have an extremely low chance of developing DSRCT. The overall risk remains less than 1 in a million people per year.

What are the possible complications of DSRCT?

DSRCT can lead to several complications, primarily because of how it grows and spreads throughout the abdominal cavity. Understanding these potential complications can help you recognize when symptoms might be getting more serious.

The most common complications include:

• Bowel obstruction: Tumors can block the intestines, preventing normal digestion
• Ascites: Fluid buildup in the abdominal cavity causing swelling and discomfort
• Malnutrition: Due to poor appetite, nausea, and difficulty eating
• Blood clots: Cancer can increase the risk of clots forming in blood vessels
• Kidney problems: If tumors compress or invade the urinary system

In advanced cases, DSRCT may spread beyond the abdominal cavity to other organs, most commonly the liver, lungs, or lymph nodes. However, this type of distant spread is less common than the local spread within the abdomen.

It's important to know that modern supportive care can effectively manage many of these complications, helping to maintain quality of life during treatment. Your medical team will monitor for these issues and address them promptly if they develop.

How is DSRCT diagnosed?

Diagnosing DSRCT typically involves several steps, as doctors need to rule out more common conditions first. The process usually begins with your medical history and a physical examination of your abdomen.

Your doctor will likely order imaging tests to get a better look at what's happening inside your abdomen. A CT scan of the abdomen and pelvis is often the first imaging study performed, as it can show the size, location, and number of masses present.

Additional tests may include:

• MRI scans for more detailed images of soft tissues
• PET scans to check for cancer activity throughout the body
• Blood tests to check your overall health and organ function
• Tumor markers, though these are not specific for DSRCT

The definitive diagnosis requires a biopsy, where a small sample of tissue is removed and examined under a microscope. The pathologist will look for the characteristic small round cells and perform special tests to confirm the EWSR1-WT1 gene fusion that defines DSRCT.

This diagnostic process can take several days to weeks, which can feel overwhelming. Remember that this thorough approach ensures you receive the most accurate diagnosis possible, which is crucial for planning the best treatment strategy.

What is the treatment for DSRCT?

Treatment for DSRCT typically involves a multi-step approach that combines different types of therapy. The goal is to shrink the tumors as much as possible and control the disease long-term.

The standard treatment approach usually includes:

1. Chemotherapy: Multiple rounds of powerful anti-cancer drugs given over several months
2. Surgery: Removal of as much tumor as possible, often combined with heated chemotherapy directly in the abdomen
3. Radiation therapy: High-energy beams targeted at remaining cancer cells

The chemotherapy phase typically comes first and may last 4-6 months. Common drug combinations include ifosfamide, carboplatin, etoposide, and doxorubicin. These medications work by targeting rapidly dividing cancer cells.

Surgery, when possible, involves a procedure called cytoreductive surgery with hyperthermic intraperitoneal chemotherapy (HIPEC). This involves removing visible tumors and then washing the abdominal cavity with heated chemotherapy drugs.

Throughout treatment, your medical team will also focus on supportive care to help manage side effects and maintain your strength and quality of life. This might include medications for nausea, nutritional support, and treatments to prevent infections.

How to manage symptoms at home during DSRCT treatment?

Managing symptoms at home can help you feel more comfortable and maintain your strength during treatment. Small daily adjustments can make a significant difference in how you feel overall.

For digestive symptoms, eating smaller, more frequent meals often works better than trying to eat large portions. Focus on foods that are easy to digest and appeal to you, even if your usual favorites don't sound good right now.

To manage fatigue:

• Rest when you need to, but try to stay gently active when possible
• Take short walks or do light stretching as tolerated
• Maintain a regular sleep schedule when possible
• Ask family and friends for help with daily tasks

For nausea and appetite issues, try eating bland foods like crackers, toast, or rice. Ginger tea or ginger supplements may help with nausea. Stay hydrated by sipping small amounts of fluids throughout the day.

Keep track of your symptoms and side effects so you can discuss them with your healthcare team. They can often adjust medications or provide additional supportive treatments to help you feel better.

How should you prepare for your doctor appointments?

Preparing for your medical appointments can help you make the most of your time with your healthcare team and ensure you get all your questions answered. A little preparation goes a long way in helping you feel more in control of your care.

Before each appointment, write down your current symptoms, including when they started and how they've changed. Note any new symptoms or side effects you're experiencing from treatment.

Prepare a list of questions you want to ask:

• What do my recent test results show?
• How is my treatment working?
• What side effects should I watch for?
• Are there ways to manage my current symptoms better?
• When is my next treatment scheduled?

Bring a complete list of all medications you're taking, including over-the-counter drugs and supplements. Consider bringing a family member or friend to help you remember what was discussed and to provide emotional support.

Don't hesitate to ask for clarification if you don't understand something. Your healthcare team wants to ensure you fully understand your condition and treatment plan.

What's the key takeaway about DSRCT?

DSRCT is a rare but serious cancer that primarily affects young people. While the diagnosis can feel overwhelming, advances in treatment have improved outcomes for many patients in recent years.

The most important thing to remember is that you're not alone in this journey. Your medical team has experience treating this rare cancer and will work with you to develop the best possible treatment plan for your specific situation.

Early recognition of symptoms and prompt medical attention can make a difference in treatment outcomes. If you're experiencing persistent abdominal symptoms, especially if you're a young person, don't hesitate to discuss them with your healthcare provider.

Remember that having concerning symptoms doesn't mean you have DSRCT. This cancer is extremely rare, and your symptoms are much more likely to be caused by a common, treatable condition. However, getting evaluated gives you peace of mind and ensures you receive appropriate care whatever the cause may be.