| | Final Diagnosis -- Case 281 (Site not responding. Last check: ) |
 | | Additionally the presence of sebaceous differentiation in some of the intranodal salivary gland inclusions and demonstration of a fibrous capsule with sinuses, lymphoid follicles and germinal centers in most of the tumors, support the presence of an underlying lymph node component. |
 | | It is possible that parotid gland tissue entrapped within lymph nodes may undergo cystic degeneration to become a lymphoepithelial cyst, sebaceous differentiation to become a sebaceous lymphadenoma or sebaceous lymphadenocarcinoma, or oncocytic differentiation to become a Warthin's tumor. |
 | | Sebaceous lymphadenoma may be mistaken for a low-grade mucoepidermoid carcinoma, especially on a small biopsy specimen. |
| path.upmc.edu /cases/case281/dx.html (465 words) |