| Adenosquamous carcinoma | Pure squamous cell carcinoma | ||
---|---|---|---|---|
 | After treatment of adenocarcinoma | De novo | After treatment of adenocarcinoma | De novo |
 | 18 cases, Parwani [1] | 7 cases, Parwani [1] | 3 cases, Parwani [1] | 6 cases, Kanthan [10] |
 | 6 cases, Bassler [9] | 4 cases, Bassler [9] | 1 case, Miller [11] | 5 cases, Parwani [1] |
 | 2 cases, Wernert [12] |  | 1 case, Mohan [3] | 2 cases, Nabi [2] |
 | 1 case, Braslis [13] |  | 1 case, John TT [14] | 2 cases, Little [15] |
 | 1 case, Devaney [8] |  | 1 case, Rahmanou [4] | 1 case, Wernert [12] |
 |  |  |  | 1 case, Okada [5] |
 |  |  |  | 1 case, Sarma [6] |
 |  |  |  | 1 case, Uchibayashi [16] |
 |  |  |  | 1 case, Di Pietro [17] |
Total | 28 cases | 11 cases | 7 cases | 20 cases |