TESTICULAR MASS OR LUMP (TUMOR SIGNS)
WHAT THIS SYMPTOM USUALLY MEANS
Testicular lumps are always abnormal and frequently represent tumors in intact male dogs.
MOST COMMON CAUSES
MILD
None—testicular lumps require evaluation.
MEDICAL
• Sertoli cell tumor
• Seminoma
• Leydig cell tumor
• Epididymal cyst
• Chronic inflammation
EMERGENCY
• Rapid enlargement
• Pain
• Scrotal discoloration
RED FLAGS
• Uneven testicle size
• Nipple enlargement (estrogen effect)
• Reduced energy
• Weight loss
• If unsure, treat as urgent.
AT-HOME CARE
None appropriate—requires veterinary exam.
WHAT A VETERINARIAN WILL CHECK
• Testicular palpation
• Ultrasound
• Hormone panel (if feminization syndrome suspected)
• Chest imaging (check metastasis)
MOST LIKELY DIAGNOSES
• Testicular tumor
• Cyst
• Orchitis
WHEN TO SCHEDULE A VISIT
Today: any testicular lump
LONGEVITY IMPACT
Testicular tumors can spread or alter hormones (feminization syndrome), shortening lifespan if untreated.
LONGEVITY CONSULT
Important after diagnosis for whole-body longevity planning.