| Author | Site | Age/Sex | Clinical course (Duration) | Size | LNI / DM | Treatment | Follow-up (Duration) |
| Abe M, 2015 [5] | Upper lip | 61/F | Painless mass (1 year) | 0.8 | NA | NA | NA |
| Aizawa T, 2016 [6] | Lower lip | 41/M | Slow growth, painless (3 mo) | 1.5x1.3 | -/- | S | LNM (26 mo) |
| Bishop JA, 2013 [7] | Buccal mucosa | 71/M | NA | 1.0 | -/- | S | Only 1 case of upper lip locally recurred. Mean follow-up: 42 mo (4-85mo) | Hard Palate | 25/F | NA | -/- | S | Soft Palate | 20/F | 0.9 | -/- | S | Soft Palate | 86/F | 1.0 | -/- | S | Soft Palate | 79/F | 0.7 | -/- | S | Upper lip | 62/F | 0.3 | -/- | S | Upper lip | 71/M | 0.6 | -/- | S | Lower lip | 59/M | 0.9 | -/- | S | Lower lip | 68/M | 0.5 | -/- | S |
| Bissinger O, 2017 [8] | Floor of mouth | 34/M | | 0.8 | -/- | S | No recurrence |
| Chiosea SI, 2012 [4] | Soft palate-3 case, Buccal mucosa – 2 case, Tongue base- 1 case. Further clinical data not available |
| Connor A, 2012 [9] | Oral cavity (NS) | Mean:40 y (14-77y) | NA | 1.8 | -/- | S | NA | Roof of mouth | 0.5 | -/- | S | Inner cheek | NA | -/- | S | Lip | 1.2 | -/- | S |
| Cooper D, 2013 [10] | Soft palate | 43/M | Slow growing, painless | 2.5 | -/- | S | No recurrence (14 mo) | Soft palate | 26/F | Painless (7 mo) | 0.7 | -/- | S | No recurrence (24 mo) |
| Din NU, 2016 [11] | Buccal mucosa | NA |
| Fehr A, 2011 [12] | Soft Palate | 71/F | NA | Oral mucosa | 43/M |
| Griffith C, 2011 [13] | Upper lip | 15/M | NA | NA | -/- | NA | NA |
| Guilmette J, 2017 [14] | Buccal mucosa | 64/F | NA | 0.6 | -/- | NA | NA |
| Helkamaa T, 2015 [15] | Hard palate | 35/M | Ulcerated, tender (6 mo) | 2.0x1.5 | -/- | S | No recurrence (18 mo) |
| Hindocha N, 2017 [16] | Upper lip | 27/F | Slow growing (1y) | 1.5 | -/- | S | No recurrence | Labial mucosa | 51/M | Asymptomatic, firm (3y) | | -/- | S | No recurrence |
| Kai K, 2017 [17] | Buccal mucosa | 58/M | NA | 3.0 | NA | S | No recurrence (1 y) |
| Keishling M, 2014 [18] | Buccal mucosa | 5/F | (4mo) | 1.5x1.5x1.3 | -/- | S | NA |
| Khurram SA, 2017 [19] | Buccal mucosa, Lower lip and Soft palate- 1 case each. Further clinical data not available. |
| Kratochvil FJ, 2012 [20] | Upper lip | 48/M | Slow growth, painless | 1.0 | -/- | S | No recurrence (8 mo) | Labial mucosa | 52/M | Painless | 0.7x0.3 | -/- | S | No recurrence (4 mo) |
| Laco J, 2013 [21] | Upper lip | 34/F | Slow growing, painless (2y) | 1.5 | -/- | S | No recurrence (15 mo) |
| Luo W, 2014 [22] | Hard palate | 41/F | Ulcerated crater | 2.0 | +/- | S+R | No recurrence (10 mo) |
| Majewska H, 2015 [23] | Hard palate | 54/M | Slow growing, non tender (36 mo), aggressive (2 mo) | 2.0x1.0 | -/- | S+R | Local recurrence (48 mo), LNM |
| Mariano FV, 2016 [24] and Projetti F, 2015 [25] each reported 1 case (no site specified). Further clinical data not available. |
| Roy S, 2018 [26] | Upper lip | 54/M | Slow growing, painless | 1.5 | -/- | S | NA | Tongue | 22/F | NA | 1.5x1.5x1 | NA | S | NA |
| Serrano ML, 2015 [27] | Buccal mucosa | 41/F | Slow growing | 0.5 | NA | NA | NA | Buccal mucosa | 50/M | Slow growing | 0.5 | NA | NA | NA |
| Skalova A, 2010 [2] | Buccal mucosa | 51/F | Slow growing, painless (1y) | 1.0 | -/- | S | No recurrence (4 y) | Soft palate | 48/M | Slow growing | 1.0x1.5 | -/- | S | No recurrence (9y) | Upper lip | 32/M | Painless but grew in size | 1.0 | -/- | S+R | LNM (86 mo) |
| Skalova A, 2016 [28] | Buccal mucosa | 31/F | NA | 1.0 | -/- | S | No recurrence (11 mo) | Buccal mucosa | 24/F | 1.0 | +/- | S | LNM, Local recurrence (2y) | Upper lip | 48/M | 1.0 | -/- | S | Local recurrence (2 mo) | Lip | 50/M | 1.5 | NA | NA | NA | Retromolar gingiva | 69/F | 0.6 | -/- | S | No recurrence (2y) | Retromolar gingiva | 73/M | 1.5x2.0x2.5 | +/- | NA | NA | Lip | 62/F | 1.0 | -/- | S | No recurrence (3 y) |
| Steven TM, 2015 [29] | Upper lip | 44/F | NA | NA | NA | S | NA | Lower lip | 66/M | NA | NA | NA | S | NA | Hard palate | 54/M | NA | NA | NA | S+R | No recurrence (2 y) |
| Urano M, 2015 [30] | Lip | 40/M | (3 mo) | 1.2x1.1 | -/- | NA | No recurrence |
| Zardawi IM, 2014 [31] | Upper lip | 66/M | (6 mo) | 1.2x1.0x.08 | -/- | S | No recurrence |
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LNI / DM: Lymph node involvement / Distant metastases before treatment, S: Surgery, R: Adjuvant radiotherapy, LNM: Lymph node metastases on follow-up, mo: Month, y: Year, NA: Data not available, +/-: Present/Absent
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