[Written by a Veterinarian] What is Feline Eosinophilic Granuloma Complex? Causes, Symptoms, Treatment, and Home Care

Do you know about a condition called feline eosinophilic granuloma complex? It's a disease involving eosinophils, a type of white blood cell, which causes various skin symptoms. This article will provide a detailed explanation of eosinophilic granuloma complex.

What is Feline Eosinophilic Granuloma Complex?

What are Eosinophils?

Eosinophils are a type of white blood cell that increase in response to allergies and parasitic infections. They also play a role in suppressing inflammation. If they increase too much, they can attack normal tissues and cause inflammation.

What kind of disease is Eosinophilic Granuloma Complex?

Eosinophilic granuloma complex in cats can manifest as ulcers in the mouth or skin lesions with hair loss. Eosinophilic granuloma complex is divided into three types: eosinophilic ulcer, eosinophilic plaque, and eosinophilic granuloma.

This disease is thought to be caused by allergies, parasitic infections, bacterial infections, etc., but the exact cause is unknown.

Main Symptoms and Appearance of Eosinophilic Granuloma Complex

Eosinophilic Ulcer

Ulcers often form on the upper lip. The lip may appear to be missing a piece. Cats often don't seem bothered by it, so it's also called a painless ulcer. Besides the lips, ulcers can also form on the chin and tongue.

Eosinophilic Plaque

Commonly seen on the abdomen and neck. There is hair loss, redness of the skin, and it is moist. Due to intense itching, the cat licks and scratches frequently, which can worsen infection and sores.

Eosinophilic Granuloma

Linear skin elevations are seen on the thighs, flanks, and inside the mouth. The affected areas have hair loss and hardened skin.

Main Causes and Triggers of Eosinophilic Granuloma Complex

Connection to Allergies (Food Allergies, Environmental Allergies)

Allergies are considered the main cause of eosinophilic granuloma complex. Allergies to meat, dairy products, house dust, mold, pollen, etc., can be potential causes.

External Parasite Infections such as Fleas and Mites

External parasite infections, such as fleas and mites, can also cause allergies. This can then trigger eosinophilic granuloma complex.

It can also be triggered by insect bites or bacterial infections, not just external parasites.

Possible Involvement of Immune Abnormalities and Stress

Eosinophilic granuloma complex is a skin disease caused by an increase in eosinophils, which are immune cells. Immune abnormalities or stress can disrupt the regulation of immune cells, leading to eosinophilic granuloma complex.

Diagnosis and Treatment of Eosinophilic Granuloma Complex

Visual Inspection, Blood Test, Skin Test, Histopathological Examination

Visual inspection is important for eosinophilic granuloma complex because the skin lesions are characteristic. The areas of hair loss and ulcers are checked, and the presence of external parasites like fleas and mites is also confirmed.

Blood tests are performed to confirm an increase in eosinophils in the blood and to identify the cause of allergies.

Skin examination is also important; cells from the affected area are examined by pressing a slide glass onto it.

For skin lesions like hair loss, there is also a possibility of skin tumors or other skin diseases. If it's difficult to make a diagnosis, a part of the skin may be biopsied for histopathological examination.

Steroid Treatment, Immunosuppressive Therapy

Treatment for eosinophilic granuloma complex involves corticosteroids to suppress inflammation and itching. If there is an infection, antibiotics may also be used concurrently. If corticosteroids alone are not enough to control symptoms, immunosuppressants may be used.

Allergen Elimination and External Parasite Control

If a food allergy is suspected, the diet is changed to one that eliminates the allergens.

If a flea allergy is suspected, a pesticide is used even if no fleas are found. A single product that prevents both fleas and mites is typically used.

Tips for Preventing Recurrence and Home Care

Thorough Flea and Mite Prevention

Since allergies to fleas and mites can cause eosinophilic granuloma complex, year-round parasite control is recommended for cats with this condition.

Review Diet and Manage Allergens

In cases of food allergies, it is crucial to switch to a diet that eliminates the allergens. Instead of commercially available products, feed a prescription diet prescribed by a veterinarian.

Environmental Adjustments to Reduce Stress

Stress can impair immune regulation. This can lead not only to a weakened immune system but also to an overreaction. To minimize stress, create places for your cat to hide or provide quiet areas. Ensure fresh and sufficient water and food, and provide a clean litter box.

Make Regular Skin and Mouth Checks a Habit

Eosinophilic granuloma complex improves with treatment but is prone to recurrence. Lesions around the mouth, in particular, are often painless, so it's important to check them regularly.

Visit a Veterinarian Promptly if You Notice Symptoms

Differentiation from Other Diseases with Similar Symptoms (Tumors, Infections) is Necessary

Eosinophilic granuloma complex can be somewhat identified by the appearance of the lesions. However, if there is an infection, it can be difficult to diagnose. Also, tumors such as cutaneous lymphoma, mast cell tumors, and squamous cell carcinoma can cause similar lesions on the skin, so differentiation is necessary.

Leaving it untreated can worsen the condition. Early diagnosis is crucial.

Eosinophilic granuloma complex can be accompanied by severe itching. If the cat licks or scratches due to itching, bacterial infection can occur, leading to severe dermatitis. In such cases, it may take a long time for complete recovery. Early diagnosis and early treatment are crucial.

Summary

Eosinophilic granuloma complex is a skin disease primarily caused by allergies. Since it is prone to recurrence, home preventive measures such as flea and mite control and allergy management are important. Since tumors can also cause similar lesions, it is advisable to visit a veterinarian as soon as you notice any abnormalities.