Function‐preserving parotid surgery for benign tumors involving the deep parotid lobe

Da Vinci robot-assisted surgery for deep lobe of parotid benign tumor via retroauricular hairline approach: Exploration of a new surgical method for parotid tumors

BACKGROUND

Resection of deep lobe benign tumors of parotid requires the preservation of facial nerve and other important structures, which is closely related to the refinement of surgical operations and the aesthetics of facial incisions. The Da Vinci robotic surgical operating system is more conducive to improving treatment effects. Combined with the hairline incision behind the ear, the surgical method can be explored for both aesthetic and curative effect.

METHODS

A case of a child with deep lobe benign tumor of parotid, who undergo tumor resection via the retroauricular hairline approach with the assistance of Da Vinci robot.

RESULTS

The child successfully completed the operation. During postoperative follow-up, the patient showed no facial palsy manifestations such as crooked mouth, the incision healed well.

CONCLUSIONS

It is feasible to remove the benign tumor of deep lobe of parotid with Da Vinci robot-assisted combined with via retroauricular hairline approach, which has clinical exploration value.

Selective deep lobe parotidectomy via retroauricular hairline (Roh's) incision for deep lobe parotid pleomorphic adenoma

OBJECTIVE

Deep lobe parotid tumour is commonly removed with the covering superficial lobe of parotid gland. Total or subtotal parotidectomy leads to an increase in surgical morbidity. This study evaluated recurrence and function after selective deep lobe parotidectomy via retroauricular hairline (Roh's) incision for pleomorphic adenoma.

MATERIALS AND METHODS

Twenty-eight patients with deep lobe parotid pleomorphic adenomas underwent selective deep lobe parotidectomy with preservation of the superficial lobe and the facial lobe via Roh's incision. Each patient was evaluated with any complications, cosmetic and salivary functions and local recurrence.

RESULTS

Superficial lobe-preserving surgery via Roh's incision was successfully applied to all patients without injury to the facial nerve and the Stensen's duct for a median operation time of 65 min. Facial nerve paralysis was found only temporarily in 9 (32%) patients, and other complications were minimal. None of the patients had postoperative Frey's syndrome. Salivary secretory function in the operated side was well preserved. No recurrence was found in the patients for a median follow-up of 94 months.

CONCLUSIONS

Selective deep lobe parotidectomy via Roh's incision is a reliable option of treatment for deep lobe parotid pleomorphic adenoma.

Functional gland-preserving surgery for submandibular gland pleomorphic adenoma

PURPOSE

Conventional surgery for submandibular gland tumour is total excision of the gland affected by the tumour. Gland-preserving surgery is commonly used for benign tumours arising in the parotid gland but not in the submandibular gland. This study evaluated long-term oncological and functional outcomes after gland-preserving surgery in patients with pleomorphic adenoma of the submandibular gland via the submental approach.

METHODS

This longitudinal study included 105 consecutive patients with submandibular gland pleomorphic adenoma who underwent the gland-preserving surgery combined with the en-bloc resection of tumours via the submental approach. Salivary scintigraphy was performed 6 months after surgery, and ultrasonography was regularly followed. Intraoperative findings, postoperative complications, cosmetic and salivary functions, and tumour recurrence were assessed in these patients.

RESULTS

Median tumour size and submental incision length were 2.0 and 3.3 cm, respectively. Median operation time and amount of blood loss were 25 min and 18.5 mL, respectively. None had marginal or lingual nerve paralysis and most patients were satisfied with incision scar and facial contour. The salivary function of the affected gland was equal to that of the unaffected gland. One patient (0.9%) had single nodular recurrence 54 months after surgery and others had no recurrence for follow-up of median 96 months.

CONCLUSIONS

Pleomorphic adenoma of the submandibular gland can be safely removed by the gland-preserving surgery via the submental approach which has operation time, cosmetic and functional benefits with compromising oncological outcomes.

Minor Parotidectomy Complications: A Systematic Review

OBJECTIVES

To report descriptive statistics for minor parotidectomy complications.

METHODS

A systematic review was performed, selecting 235 studies for analysis. The incidence of complications was tabulated, and descriptive statistics calculated. Outlier studies, 1 standard deviation above the mean, were reexamined to determine potential causal factors for each complication. All studies were examined for statistically significant differences for any potential causal factor.

RESULTS

The pooled incidence of minor complications reported were hematoma 2.9% (95% confidence interval [CI]: 2.4-3.5), wound infection 2.3% (95% CI: 1.8-2.9), sialocele 4.5% (95% CI: 3.5-5.7), salivary fistula 3.1% (95% CI: 2.6-3.7), flap necrosis 1.7% (95% CI: 1.1-2.5), scar issues 3.6% (95% CI: 2.4-5.4), numbness 33.9% (95% CI: 25.6-43.4), and deformity 11.8 (95% CI: 6.9-19.5). Implants result in more wound complications, such as hematoma, sialocele, or salivary fistula. Sialocele and salivary fistula appear more frequently after less extensive parotid surgery, whereas hematoma, wound infections, flap necrosis, and aesthetic considerations are worse with more extensive resections.

CONCLUSIONS

Minor parotidectomy complications are more frequent than generally assumed and related to certain factors that should be investigated. Laryngoscope, 131:571-579, 2021.

[Surgical Management for Benign Parotid Tumors: Review of a 16-year Experience with 633 Patients]

OBJECTIVE

The objective of this study was to analyze the diagnosis and postoperative complications of benign parotid tumors for a series of 633 patients who underwent the same diagnostic methods and operation procedure in a single institute.

MATERIALS & METHODS

A series of 633 patients who underwent parotidectomy for benign parotid tumors over a 16-year period was reviewed.

RESULTS

There were 345 female and 288 male patients. The site of the tumors was divided among three groups, superficial, deep, and lower pole tumors. The numbers of each type of above tumors were 342, 122, and 169 cases, respectively. The most common pathology of the parotid tumor was a pleomorphic adenoma (372 cases) followed by a Warthin tumor (166 cases). Pleomorphic adenomas and Warthin tumors accounted for 85% of all benign tumors. The accuracy rate of fine needle aspiration cytology (FNAC) for all benign tumors was 71%, 84% for pleomorphic adenomas and 72% for Warthin tumors. Transient facial nerve dysfunction was observed in 130 patients (21%) in 612 cases of primary benign parotid tumors, and only one patient developed a permanent weakness. The incidence of transient facial nerve dysfunction was 18% in superficial tumors, 39% in deep tumors, and 15% in lower pole tumors. Significant risk factors for development of a transient facial palsy were the site of the tumors, the size of the tumors, operation time, and bleeding volume. Among these risk factors, for the site of the tumors, the deep lobe was the most important factor associated with transient facial nerve dysfunction. Transient facial nerve dysfunction recovered within 6 months in 90% of all cases.

CONCLUSIONS

The accuracy rate of FNAC for benign parotid tumors was 72%. The incidence of transient facial nerve dysfunction in deep tumors was significantly higher compared to that in superficial and lower pole tumors. According to the rate of facial palsy, operation time, and bleeding volume, benign parotid tumor should be divided among three groups, namely superficial, deep, and lower pole tumors.

Complications after surgery for benign parotid gland neoplasms: A prospective cohort study

BACKGROUND

Prospective studies on procedure-specific incidences of complications after benign parotid surgery are lacking. Predictive factors for postoperative facial dysfunction remain controversial.

METHODS

We conducted a prospective study on 132 patients undergoing parotid surgery for benign parotid neoplasms. We analyzed complication rates and assessed risk factors of postoperative transient facial palsy.

RESULTS

Facial palsy rate was 40.2% on the first postoperative day, 28.3% at 2 weeks, 3.9% at 6 months, and 1.6% at 12 months. Immediate postoperative palsy rates in subgroups of partial superficial parotidectomy, superficial parotidectomy, extended parotidectomy, and ECD were 41.5%, 43.8%, 53.8%, and 6.3%, respectively. Age, duration of surgery, and use of ultrasound knife were identified as risk factors for transient facial palsy.

CONCLUSION

Depending on the operation type, up to half of the patients experience facial palsy after benign parotid surgery. Higher age and longer duration of operation increase the risk. The role of operative instrumentation requires further studies. © 2016 Wiley Periodicals, Inc. Head Neck 39: 170-176, 2017.

The transcervical approach for parapharyngeal space pleomorphic adenomas: indications and technique

BACKGROUND

Head and Neck Parapharyngeal space tumors are rare. Pleomorphic Adenomas are the most common Parapharyngeal space tumors. The purpose of this study was to define preoperative criteria for enabling full extirpation of parapharyngeal space pleomorphic adenomas via the transcervical approach while minimizing functional and cosmetic morbidity.

METHODS

The surgical records and medical charts of 19 females and 10 males with parapharyngeal space pleomorphic adenomas operated between 1993 and 2012 were reviewed.

RESULTS

Fifteen patients were operated by a simple transcervical approach, 13 by a transparotid transcervical approach, and one by a transmandibular transcervical approach. Complications included facial nerve paralysis, infection, hemorrhage and first bite syndrome. There were three recurrences, but neither recurrence nor complications were associated with the type of surgical approach.

CONCLUSION

A simple transcervical approach is preferred for parapharyngeal space pleomorphic adenomas with narrow attachments to the deep lobe of the parotid gland and for pleomorphic adenomas originating in a minor salivary gland within the parapharyngeal space.

Selective deep lobe parotidectomy for pleomorphic adenomas

The authors' experience of the selective deep lobe parotidectomy for the treatment of pleomorphic adenomas of the deep parotid lobe is presented. A retrospective analysis of 11 patients treated between 1997 and 2010 was performed; seven were males and four were females, ranging in age from 35 to 51 years. Parameters evaluated included facial nerve weakness, the occurrence of Frey's syndrome, cosmetic outcome, and recurrence. Follow-up ranged from 18 months to 11 years. No major complications, permanent facial nerve weakness, or Frey's syndrome occurred. Four patients developed temporary facial nerve impairments that lasted between 2 and 6 weeks, and two developed a sialocele that healed in 9 days in one case and 12 days in the other. The overall cosmetic assessment was excellent in eight patients, good in two, and satisfactory in the remaining one. No recurrences occurred. The selective deep lobe parotidectomy can be considered an effective technique for the management of deep parotid lobe pleomorphic adenomas. The major advantages of this procedure include a reduction in complications such as facial nerve impairments and Frey's syndrome, and an improved cosmetic outcome.

Parotid surgery for benign tumours

PURPOSE

The majority of parotid tumours are benign, making parotid surgery a compromise between adequate tumour excision and preservation of function and facial harmony. Besides the traditional superficial or total parotidectomy, less invasive techniques have been described with similar recurrent rates. The aim of this review is to assess the evidence in the published literature and to summarise the advantages and disadvantages of the available techniques.

METHODS

A systematic search in Pubmed for studies on surgery of benign parotid tumours (BPTs) published between January 2000 and January 2012 was conducted. Case series with a clear description of the surgical technique and a minimum number of 10 patients were included.

RESULTS

Four hundred sixty-three articles were found, 49 abstracts reviewed and 37 case series were selected for this review. The surgical techniques for benign parotid tumours can largely be grouped into facial nerve dissecting (superficial parotidectomy, partial superficial parotidectomy and total parotidectomy) and non-nerve dissecting techniques (extracapsular dissection). With all of the currently used techniques, a low recurrence (<3 %) with a low incidence of permanent facial nerve morbidity (0.2-4 %) can be achieved. The tumour-facial nerve interface and pseudopodia are areas at risk for positive margins.

CONCLUSION

There is currently no agreement in the literature about the extent of surgery for BPTs to obtain an adequate margin. The tumour nerve interface is the predetermined area at risk for tumour spillage and positive margin. A prolonged follow-up is recommended. Further long-term randomised clinical trials are required to address the question of the extent of the excision in benign parotid surgery.

Management of parapharyngeal giant pleomorphic adenoma

INTRODUCTION

Pleomorphic adenoma (PA) is found rarely in the parapharyngeal space (PPS). Because of late diagnosis due to slow growth, close proximity to vital neurovascular structures and risks of surgery, it poses a great difficulty for both diagnosis and surgical management. The preferred surgical approach to the PPS is the cervical-transparotid including a total parotidectomy with facial nerve preservation combined with a cervical access for dissection of cranial nerves and vascular structures thus allowing a safe removal of the tumor together with the parotid deep lobe. We report herein our experience in the management of giant PAs involving the prestyloid PPS and describe a not well-documented transparotid route by preservation of the parotid superficial lobe in combination with an intraoral approach.

PATIENTS AND METHODS

In this retrospective study, three cases of patients having giant PAs involving the PPS are evaluated. All patients had signs of foreign body sensation in the throat and a growing mass bulging in the oropharynx. Diagnosis was based on MRI and upon preoperative intraoral biopsy. The average tumor size was 5.7 cm. Patients underwent surgery and excision of tumors via transparotid-intraoral approach. In two cases, the superficial lobe was preserved and afterwards put back in its anatomic location.

RESULTS

All patients were discharged without complications, and no recurrences were observed.

CONCLUSIONS

Preoperative diagnosis management of PPS giant tumors should be based on imaging and upon open transoral biopsy if possible. The transparotid-intraoral approach provided adequate visibility to remove large PAs involving the prestyloid PPS.