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Adrenal neoplasia in gerbils
Adrenal neoplasia is a tumor that develops in the adrenal glands, two small glands located near the kidneys. In the Mongolian gerbil, these tumors are relatively common in older animals. They can be benign (adenoma) or malignant (adenocarci...
What is it?
Adrenal neoplasia is a tumor that develops in the adrenal glands, two small glands located near the kidneys. In the Mongolian gerbil, these tumors are relatively common in older animals. They can be benign (adenoma) or malignant (adenocarcinoma), and disrupt the production of hormones such as cortisol. This disease mainly affects gerbils over two years old.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
The signs are often discreet at first and progress slowly.\n\nWe frequently observe symmetrical hair loss, especially on the body, without the skin necessarily itching. The skin may thicken or darken in places.\n\nThe gerbil may drink and urinate more than usual. A gradual weight loss sets in despite a sometimes preserved appetite, or on the contrary a drop in appetite.\n\nGeneral depression, unusual fatigue or changes in behavior (irritability, aggressiveness) may appear. In some cases, an abdominal mass becomes palpable or distension of the abdomen is visible.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
The tumor arises from an abnormal multiplication of cells in the cortex of the adrenal gland. The exact causes are not fully understood, but advanced age is the main factor. Certain lines of gerbils appear more predisposed, suggesting a genetic component.
Older age (over two years) is the main risk factor. The genetic heritage of certain breeding lines could also play a role, as well as a particular hormonal background.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
The veterinarian first performs a complete clinical examination, palpating the abdomen in search of a mass. An abdominal ultrasound often allows you to visualize the abnormal adrenal gland and assess its size. Blood tests can point to a hormonal imbalance. In some cases, a biopsy or examination after surgery confirms the precise diagnosis.
Treatment
Surgery to remove the affected gland can be considered if the tumor is localized and the animal is able to tolerate anesthesia, but the procedure remains delicate in such a small animal. Supportive medical treatment (pain management, skin care) may be offered in addition or as an alternative depending on the general condition of the gerbil.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
There is no known specific means of prevention, the disease being linked to aging. Regular monitoring of the elderly animal, with weighing and observation of the skin and coat, allows earlier detection.
Possible complications
The tumor can grow and compress nearby organs. In malignant forms, spread to other organs (metastases) is possible. Chronic hormonal imbalance can weaken the animal's general condition and immune system.
When to see a veterinarian
Unexplained hair loss that gradually spreads\nThirst and abnormally increased urine\nWeight loss despite a retained appetite\nNoticeable mass or swelling in the stomach\nNoticeable change in behavior or mood in an elderly gerbil
Prognosis
The prognosis depends on the size of the tumor, whether it is benign or malignant, and the age of the animal at diagnosis. Without treatment, the disease progresses slowly but can significantly affect quality of life. Surgery, when feasible, can improve the prognosis but carries risks related to anesthesia in an old and small animal.
Frequently asked questions
At what age can a gerbil develop this disease?
It mainly affects older gerbils, generally from the age of two, with age being the main known risk factor.
Is this tumor still cancerous?
No. It can be benign (adenoma) or malignant (adenocarcinoma). Only a thorough examination, sometimes after surgery, can determine this with certainty.
Can we operate on such a small gerbil?
Surgery is possible but remains delicate due to the small size of the animal and the anesthetic risks, especially in an elderly subject. The veterinarian assesses the benefit-risk ratio on a case-by-case basis.
Is hair loss always linked to this disease?
No, there are many causes that can explain hair loss in gerbils. Only a veterinary examination can identify its precise origin.
References
AVMA — American Veterinary Medical Association
Content reviewed by the TunisieVet editorial team · Updated 11 August 2026
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