Clinical knowledge, calmly written.

Cholangiohepatitis in cats describes inflammation affecting the bile ducts and surrounding liver tissue. The bile ducts carry digestive fluid from the liver to the intestine, and when they become inflamed, the normal flow and function of bile can be disrupted. This can happen suddenly or develop more gradually over time. Owners often notice a cat becoming quieter, eating less, or losing weight. Some cats develop a yellow tinge to the gums or skin, and vomiting or changes in thirst may also appear. The pattern and severity of signs can vary considerably, and because the liver is involved in many body processes, the picture an owner observes may be subtle or quite pronounced. This page explores the signals that may point towards cholangiohepatitis, what may be happening in the liver and bile ducts to produce those signals, how the condition is investigated, and the range of approaches that exist depending on the underlying pattern and cause.

Cruciate ligament disease in cats involves damage to one of the stabilising bands of tissue inside the knee joint. These ligaments normally prevent the bones of the lower leg from sliding forward relative to the thigh bone during movement. When a cruciate ligament is weakened or torn, the joint becomes less stable, which can lead to discomfort, altered movement, and changes in the joint over time. Owners often notice a cat favouring one back leg, moving more carefully, or spending less time on higher surfaces. The change in mobility may come on suddenly after a jump or twist, or it may develop more gradually. Some cats show only subtle differences in how they use the leg, particularly in the early stages. This page explores the patterns that may suggest cruciate ligament involvement, the changes that occur within and around the joint, the investigations that help clarify what is happening, and the range of approaches used to manage the condition in cats.

Synovial cell sarcoma is a rare tumour that arises from the soft tissues around joints, tendons, and bursae — the structures that support movement and cushion bone surfaces. It tends to grow locally and can, in some cases, spread to other parts of the body. The condition is uncommon in dogs and exceptionally rare in cats. Owners often first notice a firm swelling or lump near a limb joint, sometimes accompanied by lameness or stiffness that develops gradually. The mass may have been present for weeks or months before it becomes large enough to prompt concern. Because the signs can resemble other soft-tissue growths or joint problems, the nature of the lump is typically clarified through imaging and sampling. This page explores the patterns that may bring synovial cell sarcoma to attention, what is understood about how these tumours behave, the investigations used to characterise them, and the range of approaches that may be considered once a diagnosis is established.