Sebaceous cysts are common benign growths we usually see in dogs. They are thought to be acquired lesions arising from displaced fragments of epithelium or occluded pilosebaceous follicles. They may be single or multiple and there appears to be no age, sex or breed predilection. They may open externally and discharge a whitish brown cheesy material. Cysts should never be squeezed hard as such procedures greatly increase the chance of expressing contents into the dermis, thereby inciting a foreign body reaction and infection. Here is a sebaceous cyst that has ruptured to the outside and has also incited considerable foreign body reaction around it. Excision is curative.
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