Related Experiment Video
Updated: Mar 27, 2026
05:39
Spontaneous Murine Model of Anaplastic Thyroid Cancer
Published on: February 3, 2023
2.4K
Thymic Carcinoma with Cartilage Formation in a Dog
J K Chambers1, Y Yoshino1, R Fujiwara2
1Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan.
Journal of Comparative Pathology
|January 20, 2016
Summary
A novel canine thymic epithelial tumor variant was identified in a Chihuahua, characterized by atypical epithelial cells and cartilage formation. This discovery sheds light on the potential for thymic epithelial cells to undergo chondroid differentiation.
Area of Science:
- Veterinary Pathology
- Oncology
- Cell Biology
Background:
- Thymic epithelial tumors (TETs) are neoplasms originating from the thymus.
- Understanding the diverse histopathological presentations of canine TETs is crucial for accurate diagnosis and treatment.
- Canine thymic epithelial cells express specific cytokeratins and other markers that define their origin and potential for differentiation.
Observation:
- An 11-year-old Chihuahua presented with respiratory distress due to a large anterior thoracic mass.
- Surgical exploration revealed a mass adherent to surrounding tissues.
- Histopathology showed atypical epithelial cells, cartilage formation, and lymphocytes.
Findings:
- Immunohistochemistry revealed tumor cells positive for pan-cytokeratin (CK), CK5/6, CK19, p63, and bone morphogenetic protein (BMP) 6.
- Neoplastic epithelial cells expressed CK19 and BMP6, similar to normal canine thymic subcapsular epithelial cells.
- The presence of cartilage foci was linked to these neoplastic epithelial cells, suggesting chondroid differentiation.
Implications:
- This case represents a previously undescribed variant of canine thymic epithelial tumor.
- The findings suggest that neoplastic thymic epithelial cells can undergo cartilage differentiation.
- This expands the known spectrum of thymic neoplasms and their differentiation potential in canines.
