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Medical Conditions

  • Hip dysplasia is a deformity of the hip that occurs during growth. The hip joint is a "ball and socket" joint. During growth both the "ball" (the head of the femur or thighbone) and the "socket" in the pelvis (acetabulum) must grow at equal rates.

  • Histoplasmosis is a chronic, non-contagious fungal infection caused by the soil-dwelling fungus Histoplasma capsulatum. Histoplasma capsulatum is found globally and may infect both humans and animals. However, histoplasmosis is uncommon to rare in all but dogs and cats.

  • Horner's Syndrome is a common neurological disorder of the eye and facial muscles, caused by dysfunction of the sympathetic nervous system.

  • Horner's syndrome is a common neurological disorder of the eye and facial muscles. The condition usually occurs suddenly.

  • Acute moist dermatitis or "hot spots" are a common skin disorder in dogs. "Hot spots" can appear suddenly and become large red, irritated lesions in a short time. Hot spots are the result of intense chewing and licking. The inciting cause is often an insect bite.

  • Hydrocephalus literally means “water on the brain.” The “water” is actually an excess of cerebrospinal fluid (CSF) that has leaked inside the skull, leading to brain swelling. CSF is the fluid that surrounds the brain and spinal cord, providing both nutrients and protection. Buildup of CSF can occur in the brain if the flow or absorption of CSF is blocked or too much CSF is produced by the body. This leads to increased pressure within the skull that presses on the sensitive brain tissues. Increased intracranial pressure can lead to permanent, irreversible brain damage and death.

  • A hygroma is a fluid-filled swelling surrounded by a thick capsule of fibrous tissue that develops under the skin. Hygromas are typically not painful. They can form over any bony prominence on the dog’s body, such as the side of the hock (ankle) joint or over the side of the hip, but they are most commonly found over the elbow.

  • Hypertension is the medical term for high blood pressure. A cat is generally thought to be hypertensive when its systolic blood pressure is above 175 mm Hg.

  • Cats have two thyroid glands, which are located in the neck and play a vital role in regulating the body's metabolic rate. Hyperthyroidism is characterized by the overproduction of thyroid hormone and a subsequent increase in metabolic rate. This disease is common in older cats.

  • Hypocalcemia means that the level of calcium in the bloodstream is low. Calcium is an important electrolyte within the body, and is needed for normal function of muscles and nerves. Calcium concentrations in the blood are usually regulated very closely but occasionally the control mechanism is impaired and may result in low blood calcium concentrations.