Illustrated Articles
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Cryptorchidism is the failure of one or both testicles to descend into the scrotum. Toy breeds may be more at risk, but it can affect any breed of dog and is believed to be an inherited trait. Diagnosis can usually be made by palpation but sometimes requires blood testing or an abdominal ultrasound if the dog’s history is unknown. Risks of retained testicles include testicular cancer, spermatic cord torsion, and the development of undesirable male characteristics, so neutering is strongly recommended. Surgery is generally routine, and recovery is similar to any abdominal surgery.
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Some dogs have a condition known as paroxysmal respiration, more commonly called reverse sneezing. With this condition, the dog rapidly pulls air into the nose, whereas in a regular sneeze, the air is rapidly pushed out through the nose. The dog makes a snorting sound and seems to be trying to inhale while sneezing.
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Ringworm infections in cats are caused by a fungus, not a worm. They can be easily recognized, though definitive testing by fungal culture is recommended. Ringworm is highly contagious and can be spread between animals and from animals to people. The clinical signs, diagnosis, treatment, and risks are explained in this handout.
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Round cell tumors are among the most common skin tumors in dogs, and they typically form just under the skin, although they may change the surface of the skin above them. It is impossible to diagnose any of them without a veterinary pathologist analyzing a tissue sample of the tumor under a microscope. If detected early, most round cell tumors can be easily removed.
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A salivary mucocele is an accumulation of saliva that has leaked from an injured salivary gland or duct. Some mucoceles cause swelling of the face and neck, while others interfere with a dog’s ability to swallow or breathe normally. Treatment typically requires surgical removal of the affected salivary gland(s).
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Sarcoptic mange, also known as scabies, is caused by a parasitic mite that burrows just beneath the surface of the skin. The presence of the sarcoptic mite causes intense itching; an affected dog will constantly chew and scratch his skin. Sarcoptic mange is highly contagious to other dogs and humans.
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Seasonal flank alopecia is a skin condition in which affected dogs lose patches of hair seasonally, likely due to an abnormal response of the hair follicles to normal hormonal changes that occur with changing day length. This condition is purely cosmetic, so no treatment is necessary. Melatonin can be used to speed hair regrowth and prevent hair loss in dogs that develop this condition on a recurrent basis.
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Sebaceous adenitis is an immune-mediated disorder in which an inflammatory process is directed against the sebaceous glands in the skin. The clinical signs vary between short-haired and long-haired breeds though both experience hair loss, skin scales, and lesions that begin on the head. Unfortunately, this disease is challenging to diagnose and treat.
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Seborrhea or seborrheic dermatitis is a skin disorder in which the sebaceous glands produce an excessive amount of sebum causing scaly, flaky, itchy, and red skin. It typically affects the back, face, and flanks. It may be worse in areas with skin folds, such as the feet, neck, lips, armpits, thighs, and underside. Seborrhea can be a primary or secondary disease and is diagnosed using multiple tests to determine the underlying cause. Treatment and management depend on the cause and may include topical therapies, oral anti-inflammatories, and antibiotics.
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Seizures and syncope are commonly confused with one another due to similarities in the appearance of these episodes. Both present with collapse but there are several details, explained in this handout, that can differentiate between them, which is important for determining treatment. The prognosis for each condition varies depending on the underlying causes.