Assessment of oncologic and cosmetic outcomes of robotic elective neck dissection in early-stage tongue cancer.

[BACKGROUND] Robotic neck dissection is emerging as an alternative to conventional open neck dissection. However, the oncologic safety of robotic elective neck dissection (END) and its indications in early-stage tongue cancer are unclear.

[METHODS] We retrospectively reviewed the data of 78 patients who underwent transoral excision for T1, T2 squamous cell carcinoma of tongue with simultaneous ipsilateral END. Patients were assigned to two groups: the robotic group (n = 32)-postauricular face-lift -and the conventional group (n = 46)- transcervical incision. We compared the survival, clinical, pathologic and cosmetic outcomes of the two groups, and evaluated the number of retrieved lymph nodes and robot console time in the robotic group.

[RESULTS] The mean age was lower in the robotic group (43.6 ± 12.8 vs. 55.8 ± 14.0, p < 0.001) and the conventional group had more T2 patients (p = 0.01). The mean operation time was significantly longer in the robotic group than the conventional group (178.81 ± 33.9 vs. 92.28 ± 16.7, p < 0.001). The mean number of retrieved lymph nodes was not significantly different between the two groups (19.22 ± 8.51 vs. 20.7 ± 11.4, p = 0.41). The 5-year disease-free survival rate was not significantly different between the two groups (93.6 % vs. 82.9 %, p = 0.59). Overall scar satisfaction assessed by VAS score, the robotic group showed significantly better results compared to the conventional group (8.38 vs. 5.86, p = 0.033).

[CONCLUSION] Robotic END by a postauricular facelift approach is a feasible and safe approach for early-stage tongue cancer.