Endoscopic-Assisted Resection of Benign Tumors of the Accessory Parotid Gland.

PURPOSE: Modified endoscopically assisted resection of benign tumors in the accessory parotid gland region (APGR) has been reported, and the surgery confers a potential risk of injury to the great auricular nerve. This clinical research study provides an updated approach for the resection of benign tumors of the APGR. PATIENTS AND METHODS: Thirteen cases diagnosed with primary benign tumors in the APGR were treated by endoscopically assisted resection through a margin of the tragus, and its feasibility was evaluated. RESULTS: All tumors were completely resected. The procedures lasted 45 to 70 minutes (mean, 54 minutes). None of the endoscopically assisted surgeries proceeded to open surgery. The patients were followed for 3 to 14 months, without postoperative complications, including pain, facial or auricular nerve weakness, salivary fistula, infection, tumor recurrence, Frey syndrome, or depression deformity. The scars were concealed and esthetically satisfactory. CONCLUSION: Endoscopically assisted resection of benign tumors through a margin of the tragus in the APGR is a safe technique that achieves excellent esthetic and functional results.

Minimally invasive selective neck dissection: a prospective study of endoscopically assisted dissection via a small submandibular approach in cT(1-2_N(0) oral squamous cell carcinoma.

BACKGROUND: Selective neck dissection (SND) in clinical N0 (cN0) cases of oral squamous cell carcinoma (SCC) has been performed by surgeons using a retroauricular or modified facelift approach with robotic or endoscopic assistance. However, these procedures provide cosmetic satisfaction at the cost of possible maximal invasiveness. In this prospective study, we introduced and evaluated the feasibility as well as surgical invasiveness and cosmetic outcome of endoscopically-assisted SND via a small submandibular approach. METHODS: Forty-four patients with cT1-2N0 oral SCC (OSCC) were randomly divided into two groups of endoscopically-assisted SND and conventional SND. Perioperative and postoperative outcomes of patients were evaluated, including the length of the incision, operating time for neck dissection, estimated blood loss during the operation, amount and duration of drainage, total hospitalization period, total number of lymph nodes retrieved, satisfaction scores based on the cosmetic results, perioperative local complications, shoulder syndrome, and follow-up information. RESULTS: The mean operation time in the endoscopically-assisted group (126.04 ± 12.67 min) was longer than that in the conventional group (75.67 ± 16.67 min). However, the mean length of the incision was 4.33 ± 0.76 cm in the endoscopically-assisted SND group, and the amount and duration of drainage, total hospital stay, postoperative shoulder pain score, and cosmetic outcomes were superior in the endoscopically-assisted SND group. Additionally, the retrieved lymph nodes and complications were comparable. CONCLUSIONS: Endoscopically-assisted SND via a small submandibular approach had a longer operation time than the conventional approach. However, endoscopically-assisted SND was feasible and reliable while providing minimal invasiveness and satisfactory appearance.

RECK overexpression reduces invasive ability in ameloblastoma cells.

BACKGROUND: Ameloblastoma is a frequent odontogenic neoplasm characterized by local invasiveness and high risk of recurrence. Reversion-inducing cysteine-rich protein with Kazal motifs (RECK) is a tumor suppressor that inhibits metastasis and angiogenesis. The aim of this study was to investigate effects of RECK overexpression on invasive potential in ameloblastoma cells. METHODS: Lentiviral vectors containing human RECK gene were created and subsequently stably transfected into immortalized ameloblastoma cell line hTERT(+) -AM. Functional characteristics of hTERT(+) -AM cells with stable RECK overexpression included proliferation, migration, invasion, and regulation of matrix metalloproteinases (MMP)-2, MMP-9 measured by zymography or commercially available assays. RESULTS: The stable and higher expression of RECK mRNA and protein (P < 0.01) was detected in RECK-transfected hTERT(+) -AM cells. RECK overexpression caused a decrease in migration and invasion (P < 0.01) for hTERT(+) -AM cells and a decrease in activity of MMP-2, MMP-9 (P < 0.01). Proliferation was not affected by RECK overexpression (P > 0.05). CONCLUSIONS: Overexpression of RECK gene significantly inhibited cell invasive ability of hTERT(+) -AM cells, suggesting RECK may be a new target for ameloblastoma treatment.

Postoperative immune response and surgical stress in selective neck dissection: Comparison between endoscopically assisted dissection and open techniques in cT1-2N0 oral squamous cell carcinoma.

BACKGROUND: Endoscopically assisted selective neck dissection (SND) has recently been applied in clinical N0 cases of oral squamous cell carcinoma (OSCC). However, nothing is known of the immune response after surgery. METHODS: A total of 60 patients with cT1-2N0 OSCC randomly underwent endoscopically assisted SND and open operations. The serum levels of IL-6, IL-8, IL-10, IL-1b, TNF-a, CRP, cortisol, ACTH, and growth hormone were analyzed before the start of the surgery (T0) and at 2 (T1), 6 (T2), 24 (T3), and 72 h (T4) after surgery. RESULTS: A total of 31 patients were randomized for endoscopic SND, whereas 29 underwent open procedures. The release of IL-6, IL-10 and CRP was significantly lower in the endoscopic group than in the open surgery group (p < 0.05), and cortisol levels were also lower in the endoscopic group (p < 0.05). CONCLUSIONS: Endoscopic SND could effectively provide lower inflammatory responses and surgical stress, reducing peri-operative trauma and accelerating recovery.