SYMPTOM
Missing testicle in scrotum
Owners may observe missing testicle in scrotum in their pet.
Various conditions
This symptom can occur in multiple conditions and warrants further assessment.
Why timing matters
Early observation
Early recognition allows prompt assessment and intervention if needed.
Later presentation
Persistent or worsening signs may indicate progression requiring attention.
The significance of this symptom depends on its context, duration, and associated findings.
Conditions commonly associated
Cryptorchidism
One or both testicles absent from the scrotum is the defining feature of cryptorchidism.
Cushings Disease in Dogs
Cushing's disease can cause one or both testicles to atrophy and become smaller or less palpable within the scrotum due to the chronic excess of cortisol affecting testicular tissue. In some cases, the affected testicle may shrink enough that owners perceive it as missing when comparing sides or recalling previous examinations.
Lymphoma in Dogs
Lymphoma affecting the testicles or surrounding lymphoid tissue can cause asymmetrical swelling, distortion, or displacement that may lead owners to perceive one testicle as absent or altered in position. Testicular lymphoma, though less common than other forms, can also result in tissue changes that alter the normal scrotal anatomy.
When to explore further
When the symptom is persistent or worsening
When other signs are present alongside
When daily activities or quality of life are affected
When there is uncertainty about the cause
Noting when this symptom occurs, any triggers, and how it changes over time can provide useful information for veterinary discussions.
Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS