Signet Ring Cell Carcinoma: Identifying the Signs of an Aggressive GI Cancer
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What is signet ring cell carcinoma?
Signet ring cell carcinoma is an aggressive form of adenocarcinoma that most often affects the stomach, named for cells that look like a signet ring under the microscope. [1] It grows quickly and often spreads to the abdominal lining, bones or ovaries before it is found, so it needs prompt care. [1] Treatment usually includes surgery and chemotherapy. [1]
When to get care
Persistent indigestion, abdominal pain, nausea, or vomiting that does not improve should be checked by a healthcare provider. Get urgent care for vomiting blood, black or bloody stools, or severe abdominal pain.
What the research says
In stomach cancer, the signet ring type does better early but worse when advanced. A meta-analysis of 58 studies (28,946 signet ring cell patients and 81,917 other patients) found better survival with signet ring cell cancer at an early stage (hazard ratio 0.59) and worse survival at an advanced stage (hazard ratio 1.19) (Zhao et al., Front Oncol, 2021 [2]).
Advanced signet ring cell cancer carries a clearly higher risk of death. A systematic review of 36 studies (19,174 signet ring cell and 55,942 non-signet ring cell patients) found similar survival for early cancers (hazard ratio 1.05) but significantly poorer survival for advanced tumors (hazard ratio 1.50; 95% CI 1.28 to 1.76) (Zhang et al., Front Oncol, 2021 [3]).
Signet ring cells are more likely to come back in the abdominal lining. A meta-analysis of 21 studies found that signet ring cell histology carried a higher risk of peritoneal recurrence than other types of stomach cancer (odds ratio 1.36; 95% CI 1.06 to 1.75) (Zhao et al., Expert Rev Gastroenterol Hepatol, 2020 [4]).
What Is Signet Ring Cell Carcinoma?
Signet ring cell carcinoma (SRCC) is a type of adenocarcinoma, a cancer that begins in the glandular cells lining many organs. [1] It is found mostly in the gastrointestinal (GI) tract, and about 90% of cases start in the stomach. [1] The name comes from the cells’ appearance under the microscope: they are round with one side stretched, like a traditional signet ring. [1]
SRCC is known for being aggressive and fast growing. [1] Studies describe it as an increasingly common stomach cancer subtype, even as other stomach cancers have become less common in many regions. [1] [3] Because it progresses quickly, a diagnosis calls for a prompt, thorough treatment plan built with an oncology team. For background on the more general disease, see our guide to stomach (gastric) cancer.
What are the symptoms of signet ring cell carcinoma, and how does it spread?
SRCC often causes no symptoms in its early stages. Most people do not notice problems until the cancer has already begun to spread. [1] When symptoms do appear, they look much like those of less serious digestive conditions, which makes early detection difficult. [1]
Common signs include persistent indigestion, abdominal pain, nausea, and vomiting. [1] Some people also have diarrhea, bloody stools, or extreme fatigue. [1] As the cancer spreads, usually to the lining of the abdomen (peritoneum), the bones, or the ovaries, other symptoms such as joint pain and pallor (paleness, a fast heartbeat, and trouble breathing) can appear. [1]
Symptom | Description | Why it matters |
Indigestion | Ongoing discomfort after eating | Early sign of digestive tract involvement |
Abdominal pain | Local or general stomach discomfort | May point to tumor growth or spread |
Fatigue | Constant tiredness and weakness | Common as the body copes with advanced cancer |
Pallor | Paleness and trouble breathing | Often linked to spread or related anemia |
What causes signet ring cell carcinoma, and which genetic factors play a role?
The exact cause of SRCC is still being studied. The cancer forms when an abnormal glandular cell starts copying itself, creating tumors that destroy healthy tissue around them. [1] Some evidence suggests that changes (mutations) in the CDH1 gene may play a role. [1] This gene makes a protein that helps glandular cells keep their structure and stay healthy.
General risk factors for stomach cancer, such as infection with Helicobacter pylori (see our guide to H. pylori infection), are also considered. Why the signet ring subtype is becoming more common is not yet fully understood. [1]
How is signet ring cell carcinoma diagnosed?
Diagnosis usually starts with a physical exam and a review of your symptoms. If a digestive problem is suspected, providers use imaging such as a computed tomography (CT) scan to look for tumors. [1] If a suspicious mass is found, a PET scan may be used to check whether the cancer has spread to other organs or tissues. [1]
A definite diagnosis needs a biopsy, in which a tissue sample or the whole tumor is removed and examined by a pathologist, who looks for the typical signet ring cells. [1] Special tests such as immunohistochemistry may also be done on the sample to confirm the cancer and help guide treatment. [1]
Diagnostic tool | Purpose | Key benefit |
CT scan | Shows the digestive tract and nearby organs | Locates tumors and shows their size |
Biopsy | Examines a tissue sample | Confirms the presence of signet ring cells |
PET scan | Detects metabolically active tissue | Shows whether and where cancer has spread |
Blood tests | Checks general health and organ function | Helps judge overall fitness for treatment |
How is signet ring cell carcinoma treated and managed?
Treatment is personalized and depends on where the cancer is and its stage. [1] Because SRCC is often advanced when found, a combination of treatments is usually needed. [1] Surgery is a main part of care, ranging from endoscopic procedures for very early cancers to radical resection, which removes the tumor along with nearby affected tissue and lymph nodes. [1]
Chemotherapy is also common. It may include hyperthermic intraperitoneal chemotherapy (HIPEC), in which heated cancer-killing drugs are placed directly in the abdomen during surgery. [1] Systemic chemotherapy and radiation therapy may be used to target remaining cancer cells. [1] Because SRCC is aggressive, many people ask about clinical trials that test new treatments.
Conclusion
Signet ring cell carcinoma is a serious, aggressive cancer that needs prompt, specialized medical care. A diagnosis can feel overwhelming, but understanding how the disease behaves and which treatments are available is an important first step. Ongoing research and clinical trials continue to improve how this fast-growing cancer is managed.
What are the next steps after a signet ring cell carcinoma diagnosis?
If you have digestive symptoms that do not improve, see a healthcare provider for a full evaluation. A dedicated care team and early action matter most when planning treatment for SRCC.
Trusted resources: Cleveland Clinic: Signet Ring Cell Carcinoma.
Frequently Asked Questions
What is signet ring cell carcinoma?
Signet ring cell carcinoma is an aggressive type of adenocarcinoma that usually starts in the glandular cells of the stomach or another part of the digestive tract.
Why is it called “signet ring” cancer?
Under a microscope the cells look round, with the nucleus pushed to one side, like a signet ring.
Where does SRCC most commonly start?
About 90% of cases start in the stomach. It can also start in other organs, such as the colon or the breast.
Is signet ring cell carcinoma aggressive?
Yes. It is considered a fast-growing cancer that is often already advanced by the time it is diagnosed.
What are the early symptoms of SRCC?
Early disease often causes no symptoms. Symptoms usually appear after the cancer has spread.
What are common symptoms of advanced SRCC?
Persistent indigestion, abdominal pain, nausea, vomiting, fatigue, and sometimes diarrhea or bloody stools.
How is SRCC diagnosed?
Doctors use a physical exam, imaging such as a CT scan, blood tests, and a biopsy that confirms signet ring cells under the microscope.
What is the role of the CDH1 gene?
CDH1 helps make a protein that keeps glandular cells organized. Changes in this gene may be linked to some cases of SRCC.
What is radical resection?
Radical resection is surgery that removes the tumor along with nearby tissue and lymph nodes that may contain cancer cells.
What is HIPEC?
Hyperthermic intraperitoneal chemotherapy places heated chemotherapy drugs directly into the abdomen during surgery to treat cancer cells that remain after the tumor is removed.
Is chemotherapy used for SRCC?
Yes. Chemotherapy is often part of treatment, usually together with surgery or other therapies. How well it works varies from person to person, and your oncology team chooses the plan based on your cancer.
Where does this cancer typically spread?
Signet ring cell carcinoma often spreads to the lining of the abdomen (peritoneum), the bones, and the ovaries.
Are SRCC cases increasing?
Studies describe signet ring cell cancer as an increasingly common subtype of stomach cancer, even as other stomach cancers have become less common in many regions.
Can I take part in a clinical trial for SRCC?
Many people ask about clinical trials to access new treatments that are still being studied. Ask your oncology team whether a trial fits your situation.
What should I do if I have persistent digestive symptoms?
See a healthcare provider for an exam and any needed tests. Get urgent care for vomiting blood, black or bloody stools, or severe abdominal pain.
Related Reading
Stomach Cancer (Gastric Cancer): Symptoms, Risk Factors, and Treatment Options Explained explains stomach cancer symptoms, risk factors and treatment options.
Understanding HDGC: The Inherited Risk of Diffuse Stomach Cancer explains the inherited gene change behind diffuse stomach cancer.
Upper Endoscopy (EGD): Purpose, Procedure, Preparation and Recovery describes the scope test used to view and biopsy the stomach.
Colon Cancer: Symptoms, Screening, Diagnosis, Treatment and Support covers colon cancer warning signs, screening and treatment.
References
Cleveland Clinic. Signet Ring Cell Carcinoma. Cleveland Clinic. June 20, 2024. https://my.clevelandclinic.org/health/diseases/signet-ring-cell-carcinoma
Zhao S, Lv L, Zheng K, et al. Prognosis and biological behavior of gastric signet-ring cell carcinoma better or worse: a meta-analysis. Front Oncol. 2021;11:603070. PMID 34277391. https://doi.org/10.3389/fonc.2021.603070
Zhang C, Liu R, Zhang WH, et al. Difference between signet ring cell gastric cancers and non-signet ring cell gastric cancers: a systematic review and meta-analysis. Front Oncol. 2021;11:618477. PMID 34026606. https://doi.org/10.3389/fonc.2021.618477
Zhao B, Lv W, Zhang J, et al. Different prognostic significance of signet ring cell histology for early and advanced gastric cancer patients: a systematic review and meta-analysis. Expert Rev Gastroenterol Hepatol. 2020;14(6):499-509. PMID 32421372. https://doi.org/10.1080/17474124.2020.1769476
Medical Disclaimer
This article is for informational purposes only and does not constitute medical advice. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this article.
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