Tag Archives: skin

You Make The Diagnosis: Thickened Black Skin in Dogs

The pictures below are of the abdominal skin of a dog. The skin is black in color and thickened like an elephant’s skin. Although this dog developed it on the abdomen, it can also commonly occur around the anus, underarms and muzzle. Look closely at the pictures and then answer the following questions: What is the term used to describe this kind of skin? ¬†What causes this condition to occur?

photo 1 (8)

photo 2 (7)

Diagnosis: Lichenification

Lichenification is the term used to describe skin that looks like elephant skin. Here are the most common causes of this condition ranked in the order I see them:

  1. Food Allergy
  2. Pyoderma – Bacterial infection of the skin
  3. Malassezia Dermatitis – Fungal infection of the skin by an organism called Malassezia
  4. Atopic Dermatitis – This is often simply called allergies or environmental allergies
  5. Demodectic Mange – I have seen dogs with lichenification of all their skin from demodex mites
  6. Cutaneous Diroflilariasis
  7. Primary and Secondary Acanthosis Nigrans