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A Golden Retriever canine patient was seen at a private veterinary clinic, with an extensive nodular skin formation in the right ventrolateral region, with a one-year evolution. The lesion had a soft consistency, with the presence of solid and straight nodules inside, in the middle of liquid. The material was collected through fine-needle aspiration puncture and the cytopathological result was inconclusive for neoplasm. No noteworthy changes were observed on abdominal ultrasound. After performing a computed tomography scan of the skin formation, the images were compatible with an abscess or hematoma, with areas of mineralization. The animal was submitted to surgical procedure for excisional biopsy, with the morphological diagnosis of sterile nodular panniculitis with steatonecrosis, process of cell death of adipocytes. The surgical procedure was considered curative, because even after one year, there was no recurrence in the site or formation of other skin nodules. This pathology is uncommon in dogs, especially the Golden Retrevier breed and in the abdominal region of the subcutaneous tissue. Although some hypotheses are correlated, the cause of this pathology remains idiopathic. [ABSTRACT FROM AUTHOR]