Feline Hyperadrenocorticism (Cushing's Disease)
Also known as: Cushing's Syndrome, Feline Hyperadrenocorticism
⚠ Emergency Warning Signs
Significant skin tearing or wound complications warrant prompt veterinary attention given the genuine fragility this condition can cause.
Overview
A condition caused by excess cortisol production, genuinely much less commonly diagnosed in cats compared to dogs, where this condition is more extensively discussed — feline cases are recognized but uncommon, and notably, cats with this condition frequently have concurrent diabetes mellitus, with skin fragility being a genuinely distinctive and important feature in affected cats.
Symptoms
- Skin fragility/tearing
- Increased thirst/urination
- Weight loss despite good appetite
Causes
Most commonly caused by a pituitary gland abnormality causing excess stimulation of cortisol production from the adrenal glands, or less commonly, a tumor of the adrenal gland itself directly producing excess cortisol.
Risk Factors
No strongly established specific risk factor given this condition's genuine rarity in cats compared to dogs; concurrent diabetes mellitus is notably common in affected cats, which is a genuinely distinguishing feature from the more typical canine presentation pattern.
Transmission
Not applicable — not an infectious or contagious condition.
Incubation Period
Not applicable; develops gradually as excess cortisol production continues over time.
Disease Stages & Progression
Progressive excess cortisol effects develop, including notably significant skin fragility in cats specifically (skin becoming thin and easily torn, even with routine handling), alongside other symptoms; the concurrent diabetes mellitus commonly seen in affected cats adds its own symptom profile.
Early Warning Signs
Increased thirst and urination (often related to concurrent diabetes), weight loss despite good appetite, and skin that seems unusually fragile or thin.
Advanced Symptoms
Significant skin fragility with tearing occurring even from routine handling or minor trauma (a genuinely distinctive and concerning feature in affected cats), poor wound healing, and worsening diabetes-related symptoms if this concurrent condition is present.
Diagnostic Methods
Specific hormone testing protocols, combined with imaging to help identify whether the cause is pituitary-related or a primary adrenal tumor, establishes diagnosis.
Veterinary Examination Process
Assessment of skin fragility (a genuinely notable feature in cats specifically), and general physical examination for other signs of excess cortisol effect.
Recommended Lab Tests
Specific hormone testing protocols for confirming hyperadrenocorticism, blood glucose testing, and imaging.
Diagnostic Imaging
Abdominal ultrasound can assess adrenal gland size and characteristics; imaging of the pituitary area (via CT or MRI) may be relevant depending on the suspected underlying cause.
Blood Test Indicators
Specific hormone testing (various protocols exist for confirming this diagnosis) identifies excess cortisol production; blood glucose testing given the common diabetes association.
Biopsy / Histopathology
Not typically the primary diagnostic approach; specific hormone testing and imaging are more directly relevant.
Differential Diagnoses
Other causes of the symptom pattern present, including diabetes without concurrent hyperadrenocorticism — specific hormone testing confirms this diagnosis when genuinely present.
Home Monitoring Guidance
For a cat with confirmed or suspected hyperadrenocorticism, gentle handling given the skin fragility concern, and close monitoring of any wounds for healing, is genuinely important.
Veterinary Treatment Options
Treatment depends on the underlying cause — medication to reduce cortisol production may be used for pituitary-related cases, while surgical removal is considered for a primary adrenal tumor where accessible; managing any concurrent diabetes is also an important part of comprehensive treatment. Trilostane or mitotane (medications reducing adrenal hormone production), surgical removal of an adrenal tumor when present, or radiation for a pituitary tumor are treatment options, generally pursued alongside specific management of any concurrent diabetes.
Surgery Requirements
May be considered for a primary adrenal tumor cause, where surgically accessible.
Recovery Timeline
Variable depending on the specific underlying cause and treatment approach; skin fragility and other symptoms often show gradual improvement with successful treatment.
Possible Complications
Significant skin tearing and poor wound healing given the genuine fragility this condition causes in cats, and complications related to any concurrent diabetes if present. Feline Cushing's notably causes thin, fragile skin prone to tearing (sometimes dramatically, from routine handling) more so than is typical in canine Cushing's, and frequently co-occurs with diabetes that can be genuinely difficult to control until the underlying Cushing's is also addressed.
Long-Term Management
Ongoing monitoring and treatment, with particular attention to skin fragility and any concurrent diabetes management needs.
Prevention
No established prevention given the not-well-understood cause of this condition.
Vaccination Availability
Not applicable.
Prognosis
Variable and dependent on the underlying cause and treatment approach; skin fragility genuinely complicates management and healing in affected cats.
References
American College of Veterinary Internal Medicine (ACVIM); veterinary endocrinology references.
Medications Used
- Medication to reduce cortisol production
- Diabetes management medication if this concurrent condition is present
Estimated Treatment Cost by Country
| Country | Estimated Cost Range | Notes |
|---|---|---|
| IN | 20,000–90,000 INR | |
| US | 2,000–8,500 USD | |
| UK | 1,800–7,500 GBP | |
| AU | 2,500–9,500 AUD | |
| JP | 300,000–1,000,000 JPY | |
| DE | 2,000–8,000 EUR | |
| BR | 4,000–16,000 BRL |
Frequently Asked Questions
Why is my cat's skin tearing so easily?
This is genuinely one of the more distinctive and important features of this condition specifically in cats — excess cortisol causes notable skin fragility, meaning even routine handling or minor trauma can cause tearing that wouldn't normally occur, which is exactly why gentle handling and close wound monitoring matter significantly for a cat with this diagnosis.
Why does my cat also have diabetes — is that related?
Genuinely, yes — concurrent diabetes mellitus is notably common in cats with this specific condition, reflecting how excess cortisol can affect normal blood sugar regulation; this combination is actually a recognized pattern in feline hyperadrenocorticism specifically, somewhat different from how this condition more typically presents in dogs, and managing both conditions together is an important part of comprehensive treatment.