Avascular necrosis of the tail in mice and rats is commonly known as what?

• A. Ring Tail
• B. Tail Necrosis
• C. Tail Deformity
• D. Tail Aneurysm

Answer: (A)

Ringtail is the standard name for avascular necrosis of the tail in mice and rats. It describes the familiar ring‑like constrictions that form around the tail, cutting off blood flow to the distal tissue and leading to ischemia and necrosis. This condition is most often seen in young rodents kept in environments with low humidity or other stressors that desiccate the tail skin, creating tight bands that trap and compress the tissue. The term ringtail precisely conveys the characteristic appearance of the constricted, ring‑shaped areas around the tail, unlike more generic or unrelated terms like tail necrosis, tail deformity, or tail aneurysm. Prevention centers on good husbandry—adequate humidity, warmth, clean dry cages, and avoiding drafts. If present, improving the environment can help and affected tissue may heal if the constrictions are relieved, though severe cases can result in tissue loss.