Table 1.
Differential immunohistochemistry panels in cystic renal tumors.
| Marker | Multilocular Cystic RCC (n = 10) | Cystic CCPRCC (n = 10) |
ACD-RCC (n = 20) |
Tubulocystic Carcinoma (n = 2) |
|---|---|---|---|---|
| CK7 | 10/10 (100) | 10/10 (100) | 5/20 (25) | 0/2 |
| AMACR | 3/10 (30) | 1/10 (10) | 12/20 (60) | 2/2 (100) |
| CAIX | 10/10 (box shape) | 10/10 (cup shape) | 0/20 | 0/2 |
| CD10 | 8/10 (80) | 8/10 (80) | 20/20 (100) | 0/2 |
| EMA | 8/10 (80) | 9/10 (90) | 15/20 (75) | 0/2 |
| E-cadherin | 5/10 (broken) | 10/10 (100) | 14/20 (broken) (70) | 0/2 |
Abbreviations: RCC, renal cell carcinoma; CCPRCC, clear-cell papillary RCC; ACD-RCC, acquired cystic disease associated renal cell carcinoma; CK7, cytokeratin 7; AMACR, alpha-methylacyl-CoA racemase; CAIX, carbonic anhydrase IX; EMA, epithelial membrane antigen.