Home » Diseases » In dogs » Urachal Anomalies (Malformations of the Embryonic Connection between the Bladder and Umbilical Cord)

Urachal Anomalies (Malformations of the Embryonic Connection between the Bladder and Umbilical Cord) in Dogs

Occurrence: very rare
Location of disease: Abdomen/pelvis

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

If the condition worsens / symptoms persist, consult a veterinarian.

Definition

Urachal anomalies in dogs are congenitalCongenital means "present from birth" and refers to characteristics or conditions that are already present at birth. This can include genetic disorders, developmental anomalies, or infections transmitted by the mother. malformations affecting the embryonic connection between the bladder and the umbilical cord. These anomalies can result in the urachus, which normally disappears after birth, remaining partially or completely open, leading to various health problems.

The most important facts at a glance

Urachal anomalies in dogs occur when the embryonic duct connecting the bladder to the umbilical cord does not close properly after birth. Normally, this duct transforms into a fibrous band, but genetic factors or developmental disorders can disrupt this process. Anomalies include patent urachus and urachal cysts, which can be influenced by genetic predispositions or environmental factors during pregnancy.

Symptoms often include swelling and pain on palpationPalpation is an examination method in which the condition of body tissues is assessed by feeling them with the hands. It is used to identify swelling, pain, or other abnormalities. in the umbilical area, mucus formation, urine dribbling, local inflammatory conditions, and difficulty urinating. DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is made through clinical examinations and imaging procedures such as ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. or X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. to visualize the structure of the urachus. In some cases, urine or blood tests are performed to detect infections.

Treatment varies depending on severity and may include surgery under general anesthesiaGeneral anesthesia is a medical procedure that induces unconsciousness and eliminates pain during surgical procedures. It involves the use of anesthetics to temporarily shut down the body's overall perception. to close the urachus or remove cysts. After surgery, antibiotic treatments for infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. control are often necessary. Early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment significantly improve the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop., while untreated cases can lead to complications such as chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. infections.

Preventive measures are limited, as the causes are often genetic. Breeders should be aware of genetic predispositions and ensure good prenatal care of the bitch. Research focuses on genetic and environmental causes as well as improving diagnostic methods and surgical techniques to make treatment more effective.

Causes

The urachus is an embryonic duct that connects the bladder of the developing fetusThe fetus is a developmental stage of a mammal in the womb that follows after it has passed through the embryonic phase. In humans, the term fetus is used from the 9th week of pregnancy until birth. with the umbilical cord. During normal development, the urachus should close completely after the dog’s birth and transform into a band of fibrous tissue. When this process is disrupted, urachal anomalies can occur.

There are various forms of urachal anomalies, including patent urachus, where the duct remains open, and urachal cystA cyst is a closed sac that may contain fluid, air, or other material. Cysts can occur in any part of the body and vary in size and cause., where fluid accumulates in a partially closed duct. These anomalies are typically caused by genetic factors or developmental disorders during pregnancy.

Genetic predispositions play a significant role in the development of urachal anomalies. Certain dog breeds may be more susceptible to these malformations due to their genetic makeup. Environmental factors affecting the mother during pregnancy could also influence the development of the urachus.

Symptoms

Very common symptoms:

Common symptoms:

Difficulty Urinating (Dysuria)

Symptoms of urachal anomalies in dogs can vary depending on the type and severity of the anomalyAn anomaly is a deviation from what is considered normal or expected. In medicine, it often refers to unusual physical or genetic characteristics that may be present at birth or develop later.. A common symptom is urine leakage from the umbilicus, indicating that the urachus has remained open. This can lead to skin irritation around the umbilical area.

Dogs with urachal cysts may have a palpable massIn pathology, the term “mass” is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). in the abdominalThe term “abdominal” refers to anything that concerns the belly or the abdomen. It is an adjectival expression used to describe the location, symptoms, or conditions that occur in the abdominal area. area, sometimes associated with pain. Infections are also common, as stagnant urine in the duct or cystA cyst is a closed sac that may contain fluid, air, or other material. Cysts can occur in any part of the body and vary in size and cause. provides a breeding ground for bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease.. This can lead to fever, lethargy, and decreased food intake.

Additional symptoms may include frequent urination, difficulty urinating, or blood in the urine. These signs result from impaired urinary tract function or infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. promoted by the urachal anomalyAn anomaly is a deviation from what is considered normal or expected. In medicine, it often refers to unusual physical or genetic characteristics that may be present at birth or develop later..

Diagnosis

DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of urachal anomalies is typically made through a combination of clinical examinations and imaging procedures. The veterinarian will first take a complete medical historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits. and perform a physical examination to identify obvious signs such as urine leakage from the umbilicus.

To confirm the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients., imaging procedures such as ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow., X-rays, or contrast urographyUrography is an imaging procedure that shows the structure and function of the urinary tract. In dogs and cats, it is used to diagnose abnormalities or diseases of the kidneys, ureters, bladder, and urethra. may be used. These techniques help visualize the exact structure of the urachus and the presence of cysts or other anomalies.

In some cases, urine or blood tests may be performed to identify signs of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. or other concurrent conditions. An accurate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is crucial for determining the appropriate treatment.

Therapy

Treatment of urachal anomalies depends on the type and severity of the anomalyAn anomaly is a deviation from what is considered normal or expected. In medicine, it often refers to unusual physical or genetic characteristics that may be present at birth or develop later.. In most cases, surgical intervention is required to close the open urachus or remove cysts. This surgery is typically performed under general anesthesiaGeneral anesthesia is a medical procedure that induces unconsciousness and eliminates pain during surgical procedures. It involves the use of anesthetics to temporarily shut down the body's overall perception. and requires precise surgical techniques.

After surgery, antibiotic treatment may be necessary to prevent or treat infections. In the postoperativePostoperative refers to the time after a surgical operation. This phase includes recovery and the management of possible complications after the procedure. phase, it is important to monitor the dog and ensure proper recovery without complications.

In cases where surgery is not possible or necessary, conservative treatment may be considered. This may include administration of antibiotics for infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. control and regular monitoring.

Prognosis and follow-up care

The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. for dogs with urachal anomalies varies depending on the type of anomalyAn anomaly is a deviation from what is considered normal or expected. In medicine, it often refers to unusual physical or genetic characteristics that may be present at birth or develop later. and the treatment performed. With early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and appropriate surgical treatment, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is generally good, and many dogs recover completely without long-term consequences.

However, if complications such as severe infections occur or the anomalyAn anomaly is a deviation from what is considered normal or expected. In medicine, it often refers to unusual physical or genetic characteristics that may be present at birth or develop later. is not treated in time, this can worsen the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop.. Long-term problems such as chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. urinary tract infections or scar tissue formation may occur in rare cases.

Careful monitoring and follow-up care are crucial to ensure that the dog does not develop any further health problems and recovers completely.

Prevention

Since the exact cause of urachal anomalies is often genetic, there are limited options for preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring.. However, breeders should avoid breeding animals with known genetic predispositions for these anomalies.

Good prenatal care of the pregnant bitch can also help minimize the risk of developmental disorders in the fetusThe fetus is a developmental stage of a mammal in the womb that follows after it has passed through the embryonic phase. In humans, the term fetus is used from the 9th week of pregnancy until birth.. This includes a balanced diet, regular veterinary examinations, and avoidance of environmental factors that could impair fetal development.

Regular preventive examinations at the veterinarian can help detect urachal anomalies early and treat them before they lead to serious health problems. Early intervention significantly improves the chances of successful treatment.

Outlook on current research

Current research on urachal anomalies in dogs focuses on the genetic and environmental causes of these malformations. Scientists are investigating which genetic markers are associated with dogs having a higher predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. for urachal anomalies. This is particularly important for improving breeding practices and minimizing the risk of this condition in future generations. There is evidence that certain breeds may be more susceptible to urachal anomalies, which underscores the importance of genetic studies.

Another focus of research is the development of improved diagnostic methods. Currently, a combination of ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. and radiography is often used to identify urachal anomalies. However, researchers are working on refining these techniques to enable accurate and early diagnoses. Advances in imaging technology could help detect even subtle anomalies that may have been previously overlooked.

Additionally, new surgical techniques are being developed to make treatment of urachal anomalies more effective. Traditional surgical removal of the anomaly can be supplemented by minimally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. procedures that promise faster recovery and fewer complications. Studies are also investigating the possibility of using regenerative medicine to repair or replace damaged tissue.

Another significant area of research is examining the role of nutrition and the prenatal environment in the development of urachal anomalies. It is suspected that certain deficiencies or toxins during pregnancy could increase the risk of these malformations. These studies could lead to preventive measures that reduce the occurrence of urachal anomalies.

Long-term, research aims to develop comprehensive preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. strategies that consider both genetic and environmental factors. Through collaboration across various scientific disciplines, researchers hope to gain a deeper understanding of this complex condition and thus improve the well-being of dogs worldwide.

Frequently asked questions (FAQs)

What are Urachal Anomalies in Dogs?

Urachal anomalies are malformations resulting from problems in embryonic development, particularly the connection between the bladder and the umbilical cord. These anomalies can lead to various health problems, such as recurrent infections or urinary drainage disorders. -

How are Urachal Anomalies Recognized in Dogs?

Urachal anomalies are typically recognized by clinical signs such as a persistently moist umbilical area, infections, or urinary tract problems. A definitive diagnosis is usually made through imaging procedures such as ultrasound or X-rays. -

Which Dogs are Most Often Affected by Urachal Anomalies?

While all dogs can potentially be affected, there is evidence that certain breeds may have a higher predisposition. However, research on this is not yet complete and there are no firm findings on specific breed risks. -

What Treatment Options are Available for Urachal Anomalies?

Treatment depends on the severity of the anomaly. In many cases, surgical intervention is necessary to correct the malformation. Minimally invasive techniques and the application of regenerative medicine are subjects of current research and could play a role in the future. -

Can Urachal Anomalies be Prevented?

Currently, there are no reliable methods for preventing urachal anomalies, as the exact causes are not yet fully understood. However, a healthy diet and avoidance of environmental factors that could be harmful during pregnancy are generally recommended measures. -

Are Urachal Anomalies in Dogs Genetically Determined?

It is believed that genetic factors play a role, but the exact genetic basis has not yet been fully researched. Future genetic studies could help develop more precise breeding practices to minimize the risk of this condition. -

How Common are Urachal Anomalies in Dogs?

Urachal anomalies are relatively rare, but exact frequency rates are difficult to determine, as mild cases may go undetected. However, veterinarians are increasingly aware of detecting these anomalies early. -

What Symptoms Can Indicate an Urachal Anomaly?

Symptoms may include persistent licking of the umbilical area, recurrent urinary tract infections, incontinence, or abnormal urine discharge. If a urachal anomaly is suspected, the dog should be examined by a veterinarian. -

How is the diagnosis of urachal anomalies made?

Diagnosis is typically made through a combination of clinical examinations and imaging procedures. Ultrasound is a commonly used method, as it provides a detailed view of internal structures. -

What Long-Term Effects Can Urachal Anomalies Have on a Dog's Health?

If left untreated, urachal anomalies can lead to chronic infections and other health problems. Timely diagnosis and treatment are crucial to avoid possible complications and maintain the quality of life of the affected dog.