Malignant melanoma and lymph node metastases appearing as hyperattenuating masses on computed tomography in a dog.
Luzanne van der LaanChristelle Le RouxPublished in: Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association (2024)
A 16-year-old male castrated Dachshund cross dog was referred for a dental and a mass on the right side of the face. CT revealed several heterogenous precontrast hyperattenuating masses within the subcutaneous tissue over the masseter muscle, demonstrating marked contrast uptake. The ipsilateral mandibular lymph nodes were mildly enlarged and markedly hyperattenuating on precontrast images. A histopathological final diagnosis of malignant melanoma with regional lymph node metastasis was made, and the hyperattenuating appearance was postulated to be due to its melanin content. This is the first published report of melanoma appearing as hyperattenuating masses on CT in small animals.
Keyphrases
- contrast enhanced
- lymph node
- computed tomography
- lymph node metastasis
- magnetic resonance imaging
- dual energy
- magnetic resonance
- positron emission tomography
- image quality
- sentinel lymph node
- neoadjuvant chemotherapy
- squamous cell carcinoma
- fine needle aspiration
- papillary thyroid
- ultrasound guided
- skeletal muscle
- systematic review
- deep learning
- convolutional neural network
- single cell
- oral health
- radiation therapy
- locally advanced
- rectal cancer