Sertoli cell tumor in dogs (Sertoli cell tumor)
- Occurrence: common
- Location of disease: Abdomen/pelvis
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
A Sertoli cell tumor is a type of testicular tumor in dogs that arises from Sertoli cells, which support and nourish the seminiferous tubules in the testicle. These tumors are commonly found in older, unneutered male dogs and can cause hormonal imbalances.
Das Wichtigste auf einen Blick
The Sertoli cell tumor is a testicular tumor in dogs that originates from Sertoli cells. These tumors can be hormonally active and lead to symptoms such as feminizing effects. The exact causes of Sertoli cell tumors are not fully understood, but genetic predispositions, hormonal influences, and environmental factors play a role. Certain dog breeds such as Boxers and Shetland Sheepdogs are particularly susceptible. Cryptorchidism, a condition in which the testicles do not descend into the scrotum, also increases the risk.
Symptoms can include testicular lumps, changes in testicular size, and hormonal imbalances. Diagnosis is made through physical examination, imaging, and tissue biopsies. The primary treatment is surgical removal of the affected testicle. In advanced cases, chemotherapy or radiation therapy may be required. The prognosis is often good if the tumor is detected early; caution is advised in cases of metastasis.
Prevention includes early castration/neutering of dogs, especially in cases of cryptorchidism, as well as regular veterinary examinations. Research focuses on genetic markers, environmental factors, improved diagnostic procedures, and new therapies. Long-term studies investigate prognosis and quality of life. The immune response and psychological effects on dogs and their owners are also being researched.
Ursachen
Sertoli cells are specialized cells in the testicle that play an important role in spermatogenesis by supporting sperm development. These cells are also involved in producing hormones such as inhibin, which regulates the release of FSH (follicle-stimulating hormone) in the pituitary gland. A tumor arising from these cells can impair normal Sertoli cell function and lead to hormonal disorders.
The exact cause of Sertoli cell tumors is not fully understood, but there are some known risk factors. These include genetic predispositions, hormonal influences, and environmental factors. Certain dog breeds such as Boxers, Shetland Sheepdogs, and Afghan Hounds appear to be at higher risk, suggesting a genetic component.
Another significant risk factor is cryptorchidism, a condition in which one or both testicles do not descend into the scrotum. Dogs with cryptorchidism have an increased risk of developing Sertoli cell tumors because the testicles remain in the abdomen at a higher body temperature, which can promote tumor development.
Symptoms
The symptoms of a Sertoli cell tumor in dogs can vary and are often associated with the hormonal imbalance caused by the tumor. One of the most common symptoms is bilateral symmetrical alopecia, a symmetrical hair loss, caused by an excessive production of estrogen.
Other symptoms may include mammary gland enlargement (gynecomastia), behavioral changes, including increased aggression, and shrinkage of the unaffected testicle. In some cases, anemia and a weakened immune system may also be observed, which can lead to further health complications.
With advanced tumor growth, there may be visible enlargement of the testicle. In rare cases, metastatic tumors can cause symptoms such as lethargy, loss of appetite, and Weight loss.
Diagnose
Diagnosis of a Sertoli cell tumor usually begins with a thorough clinical examination by a veterinarian. Suspicion of a tumor may be raised by a physical exam and recognition of typical symptoms such as alopecia or enlargement of the testicle.
Imaging methods such as ultrasound or X-ray can be used to assess the size and presence of tumors in the testicle. However, an accurate diagnosis often requires a fine-needle aspiration or a biopsy of the affected tissue to determine the type of tumor.
Additional blood tests can be used to assess the extent of hormonal imbalances. In particular, measuring estrogen and testosterone levels can provide information about tumor activity.
Therapie
The primary treatment for a Sertoli cell tumor is surgical removal of the affected testicle, a procedure known as orchiectomy. This surgery is usually effective at stopping tumor growth and correcting hormonal imbalances.
In cases where the tumor has metastasized or is inoperable, additional treatments such as chemotherapy or radiation therapy may be considered. These treatments aim to kill tumor cells or slow their growth.
After surgical removal of the tumor, hormone therapy may be necessary to restore normal hormone levels and treat the symptoms of hormonal imbalance. Regular follow-up care is important to monitor treatment success and detect possible relapses early.
Prognose und Nachsorge
The prognosis for dogs with a Sertoli cell tumor is generally good, especially if the tumor is detected and treated early. Surgical removal of the tumor often leads to complete recovery and normalization of hormone levels.
For metastatic tumors, the prognosis is more cautious. Long-term survival rates depend on the spread of the tumor and the response to additional treatments such as chemotherapy. Early diagnosis and treatment are crucial for a positive prognosis.
Prävention
One of the most effective measures for prevention of Sertoli cell tumors is early castration / neutering of dogs, especially in animals with cryptorchidism. This significantly reduces the risk of tumor formation because the testicles are removed before tumors can develop.
Regular veterinary examinations are important to detect early signs of tumors or hormonal imbalances. Owners should pay attention to changes in their dogs’ behavior, coat condition, or testicular size and consult a veterinarian if they suspect anything.
For breeds with a genetic predisposition to testicular tumors, targeted breeding planning can help minimize the risk. Avoiding the breeding of dogs with cryptorchidism can also contribute to prevention.
More information and scientific studies on Sertoli cell tumors in dogs can be found in the NCBI PubMed database and on the ScienceDirect portal.
Ausblick auf aktuelle Forschung
The Sertoli cell tumor, a testicular tumor originating from Sertoli cells, is one of the more common forms in dogs. These tumors are generally benign but can be hormonally active and cause symptoms such as feminizing effects, including gynecomastia or hair loss. Current research focuses on understanding the molecular mechanisms that lead to tumor development, as well as the effects of hormonal changes in the dog’s body.
A focus of current scientific studies is the identification of genetic markers that could predispose to the development of Sertoli cell tumors. Genetic predispositions are being investigated to determine if certain breeds or lines of dogs are more frequently affected. This could lead to preventive measures in the future to minimize the risk of tumor development.
Another area of research involves investigating the role of environmental factors in the development of Sertoli cell tumors. Studies are examining the extent to which exposure to certain chemicals or environmental conditions can increase the risk of tumors. These studies could lead to better protective measures for affected dogs in the long term.
Furthermore, there are advances in the development of diagnostic techniques that allow for earlier and more accurate detection of Sertoli cell tumors. Imaging procedures and blood tests that detect specific tumor markers are under development to improve diagnostic accuracy and optimize treatment planning.
In the therapy of Sertoli cell tumors, the effectiveness of new surgical techniques and the role of adjuvant therapies, such as chemotherapy and radiation therapy, are currently being researched. The goal is to improve treatment outcomes and reduce possible postoperative complications.
In parallel, research is being conducted on how hormone therapies can be used to minimize the effects of elevated estrogen levels. The research focuses on finding the best strategies to control hormone-related symptoms and improve the well-being of affected dogs.
Long-term studies are also underway to better understand the prognosis in dogs with Sertoli cell tumors. These studies help to evaluate the life expectancy and quality of life of affected dogs and to develop the best management strategies.
Another interesting aspect of research is investigating the immune response in dogs with Sertoli cell tumors. Scientists are trying to understand how the immune system responds to these tumors and whether immunotherapies could be a potential treatment option.
Finally, there is a growing number of studies looking at the psychological impact of testicular tumors on dogs and their owners. This research aims to develop support mechanisms that make it easier to cope with the diagnosis and treatment.
Frequently Asked Questions (FAQs)
1. What is a Sertoli cell tumor?
2. How common are Sertoli cell tumors in dogs?
3. What symptoms do dogs with a Sertoli cell tumor show?
4. Are Sertoli cell tumors in dogs malignant?
5. How is a Sertoli cell tumor diagnosed?
6. What treatment options are available for Sertoli cell tumors in dogs?
7. Can Sertoli cell tumors in dogs be prevented?
8. Is the prognosis for dogs with Sertoli cell tumors good?
9. How do Sertoli cell tumors affect the behavior of dogs?
10. Which breeds are most commonly affected by Sertoli cell tumors?
Literatur
- Gazin, A. A., Vatnikov, Y. A., Sturov, N. V., Kulikov, E. V., & others. (2022). Canine testicular tumors: An 11-year retrospective study of 358 cases in Moscow Region, Russia. Veterinary World, 15(2), 483–490. https://doi.org/10.14202/vetworld.2022.483-490
- Manuali, E., Forte, C., Porcellato, I., Brachelente, C., Sforna, M., Pavone, S., Ranciati, S., & Morgante, R. A. (2020). A five-year cohort study on testicular tumors from a population-based canine cancer registry in central Italy. Preventive Veterinary Medicine, 185, 105201. https://doi.org/10.1016/j.prevetmed.2020.105201
- Grieco, V., Riccardi, E., Greppi, G. F., Teruzzi, F., Iermanò, V., & Finazzi, M. (2008). Canine testicular tumours: A study on 232 dogs. Journal of Comparative Pathology, 138(2–3), 86–89. https://doi.org/10.1016/j.jcpa.2007.11.002
- Post, K., Kilborn, S. H., & Milligan, J. D. (1987). Canine Sertoli cell tumor: A medical records search and literature review. The Canadian Veterinary Journal, 28(7), 427–431.
- Weaver, A. D. (1983). Survey with follow-up of 67 dogs with testicular Sertoli cell tumours. Veterinary Record, 113(5), 105–107. https://doi.org/10.1136/vr.113.5.105
- Salyer, S. A., et al. (2022). Outcome of dogs with bone marrow suppression secondary to Sertoli cell tumours. Journal of Small Animal Practice, 63(5), 353–360. https://doi.org/10.1111/jsap.13457
- Holst, B. S., Dreimanis, U., & others. (2015). Anti-Müllerian hormone: A potentially useful biomarker for the diagnosis of canine Sertoli cell tumours. BMC Veterinary Research, 11, Article 166. https://doi.org/10.1186/s12917-015-0495-5
- Marshall, H., Manku, M., & others. (2018). Estrogen-induced myelotoxicity in a 4-year-old golden retriever with a Sertoli cell tumor. The Canadian Veterinary Journal, 59(4), 379–384.