Increased tumour size | Boddeart (80), Harrison-Phipps (84), England (223), Gupta (28), Helage (56), Lahon (157), Tan (82) | Yeom (41), Cardillo (110), McGuire (23) | Franzen – DFS (42), Tapias – RFS (59) | Schmid (25), McGuire (23), Guo (39) |
Presence of symptoms | Boddeart (80), Cardillo (110), Lahon (157) | McGuire (23), Tan (82) | | Schmid (25), McGuire (23), Tapias (59), Franzen (42) |
Parietal rather than visceral tumour origin | England (223) | McGuire (23), Cardillo (110), Harrison-Phipps (84), Boddeart (80), Lahon (157), Tan (82) | Tapias – RFS (59) | McGuire (23), Cardillo (110), Franzen (42) |
Sessile attachment | England (223), Lahon (157) | McGuire (23), Gupta (28), Harrison-Phipps (84), Boddeart (80) | Boddeart – DFS (80), Lahon – recurrence (157) | Franzen (42), Tapias (59), McGuire (23) |
Pleural effusion | Boddeart (80), England (223), Gupta (28), Helage (56) | | Tapias – RFS (59), Boddeart – OS and DFS (80) | |
Intra-tumoural calcification | Gupta (28) | Helage (56) | | |
Malignant features on histology | N/A | N/A | Franzen – DFS (42), Lahon – DFS (157), Boddeart – DFS (80), Cardillo – DFS (110), Harrison-Phipps – recurrence and OS (84) | McGuire (23), Franzen (42), Boddeart – OS (80) |