Parotid Metastasis Research Articles

Bilateral Parotid Gland Oncocytoma Mimicking Oropharyngeal Cancer Metastasis: A Case Report from a Radiation Oncologist's Perspective.

Parotid oncocytomas typically present as benign, unilateral, slow-growing, painless, and solitary masses that are histologically firm and multilobulated. They are often misdiagnosed as pleomorphic adenomas, hemangiomas, or other forms of oncocytosis. However, in our case, the parotid oncocytomas initially mimicked bilateral parotid gland metastasis of advanced oropharyngeal cancer. Here, we present a case of oropharyngeal cancer with bilateral parotid oncocytomas treated with chemoradiotherapy (CCRT). We report the case of a 74-year-old man with a sore throat, neck pain, right earache, oropharyngeal cancer, and bilateral parotid gland oncocytoma. Head and neck computed tomography and magnetic resonance imaging (MRI) showed soft-tissue swelling in the right tonsillar fossa and several enlarged level II neck lymph nodes. MRI revealed enhancing masses in both parotid glands, initially suspected to be metastatic lymph nodes. A biopsy of the right palatine tonsil confirmed squamous cell carcinoma with human papilloma virus-16 positivity. A positron emission tomography scan was performed, and biopsy-proven malignant lesions were observed in the right tonsillar region with metastatic lymph nodes in the right and left neck. Focal hypermetabolism was observed in the parotid glands, suspected to be pathological lesions such as metastatic intra-parotid lymph node or Warthin's tumor. An ultrasonography-guided biopsy of the left parotid gland confirmed an oncocytoma. Based on these results, the patient was scheduled for CCRT. After pathological confirmation of parotid oncocytoma, CCRT was administered, excluding the parotid glands within the radiotherapy field. This is a case of bilateral parotid gland oncocytoma mimicking oropharyngeal cancer.

Clinical features and prognosis of parotid metastasis of breast cancer: retrospective analysis of 57 cases.

Parotid gland metastases originating from breast origin are extremely rare, with their clinical presentation, therapeutic approaches, and prognostic indicators remaining to be elucidate. A comprehensive retrospective review was conducted, analyzing the clinical characteristics and prognostic factors of 57 patients diagnosed with parotid metastasis of breast cancer in the existing literature. Notably, our study included two unique cases of patients who developed contralateral and ipsilateral parotid metastases, occurring 5 years and 32 years respectively after primary surgery. This analysis aimed to provide a deeper understanding of the disease presentation and identify potential prognostic indicators. The primary clinical manifestation presented in breast cancer patients with parotid metastases was painless masses in the parotid glands, synchronously or metachronously occurred with primary breast tumors. The predominant pathological subtype among these patients was invasive ductal carcinoma. Out of the 57 patients studied, 24 (42.1%) exhibited metastases solely in the ipsilateral parotid gland, while 18 cases (31.6%) involved either the contralateral or bilateral parotid gland. Patients may solely exhibit metastasis in the parotid gland, or they may present with concurrent multiple metastases in other organs. Patients who suffered from parotid metastases, either merely or accompanied with bone-only metastasis, exhibited significantly longer overall survival (OS) rates compared to those who had concomitant metastases in other organs (1.23 ± 0.26 years vs 4.46 ± 0.77 years, P=0.046). While no statistically significant differences in OS were observed among patients presenting with metastases in the ipsilateral, contralateral, or bilateral parotid glands, a notable variance could be discerned from the Kaplan-Meier curve analysis. Additionally, no significant difference in survival was exhibited between patients with different interval of progression from primary breast sites to initial diagnosis of parotid metastases (uDF), nor for patients who were treated with surgery or palliative therapy. Parotid metastasis, a rare and distinctive form of breast cancer metastasis, demands particular scrutiny in patients exhibiting metastasis to multiple organs or contralateral or bilateral parotid glands.

Parotid Gland Metastasis of Conjunctival Squamous Cell Carcinoma: A Case Report of a Rare Phenomenon

Abstract Squamous cell carcinoma (SCC) of the conjunctiva is rare. It is commonly associated with ultraviolet ray exposure, viral infections, and conjunctivitis. Its management includes surgical excision with adjuvant treatment. Surgery alone leads to a high risk of recurrence even in early stages. Local recurrence is most common, and chemotherapy is preferred over resurgery in such cases. Lymphatic and distant metastases are seen in advanced cases. Here, we present an elderly female with early-stage SCC of the conjunctiva who underwent surgery alone, defaulted, and presented with parotid gland metastasis without any evidence of residual disease in the eye. The various lines of management have been discussed here.

Guiding function of positron emission tomography-computed tomography examination in the diagnosis and treatment of ocular adnexal mucosa associated lymphoid tissue lymphoma.

To explore the role of positron emission tomography-computed tomography (PET-CT) examination in the diagnosis and treatment of ocular adnexal mucosa associated lymphoid tissue lymphoma (OAML). The general clinical data, postoperative PET-CT results, treatment regimens, and the prognosis of 21 histopathologically confirmed OAML patients between October 2017 and September 2021 were collected. Among the 21 patients, five patients underwent surgical treatment alone, 13 patients underwent surgical treatment combined with radiotherapy, and three patients underwent surgical treatment combined with chemotherapy. The follow-up period ranged from 8 to 79mo, with four cases of recurrence and no deaths. Through PET-CT examination, two patients exhibited both local ocular metabolic elevation and systemic metastasis, and one of these patients had cervical lymph node metastasis, while the other had submandibular and parotid gland metastasis. Nine patients showed only local ocular metabolic elevation, while 10 patients had no abnormal metabolic activity locally. PET-CT examination plays a crucial role in detecting residual lesions and recurrence following tumor resection, aiding in precise disease staging, and facilitating the development of personalized treatment plans, ultimately improving patient prognosis.

Neck management in metastatic cutaneous squamous cell carcinoma of the head and neck.

Optimal neck management remains unclear in head and neck cutaneous squamous cell carcinoma (HNcSCC) with parotid metastasis. Our goal was to compare the impact of different cervical treatments on HNcSCC with parotid metastasis. Patients were retrospectively included. The primary outcome variables were regional control (RC) and disease-specific survival (DSS). The impacts of observation, elective neck irradiation (ENI), and elective neck dissection (END) were analyzed using the Cox model and presented as hazard ratios (HRs) and 95% confidence intervals (CIs). In total, 268 patients were enrolled. In the Cox model for RC, compared with ENI, observation was associated with a significantly higher risk of regional recurrence (p = 0.001, HR = 2.50, 95%CI = 1.45-4.30). However, END showed a comparable influence on regional recurrence (p = 0.246, HR = 0.70, 95%CI = 0.38-1.28). In the Cox model for DSS, END demonstrated a similar HR of 0.62 (95%CI = 0.30-1.26) compared to ENI (p = 0.184). However, patients who underwent observation were associated with an additional nearly twofold risk of cancer-related mortality (HR = 2.85, 95%CI = 1.55-5.23). Subgroup analysis showed that ENI predicted comparable RC (p = 0.389) and DSS (p = 0.346) in patients with one or two metastatic parotid lymph nodes, but worse RC (p = 0.007) and DSS (p = 0.024) in patients with more than three positive lymph nodes. In HNcSCC with parotid metastasis, elective treatment of neck lymph nodes with END or ENI should always be performed.

Neck management in cutaneous squamous cell carcinoma with parotid metastasis.

Our objective is to assess the oncologic outcomes of observation, elective neck dissection (END), and elective neck irradiation (ENI) in the neck management of head and neck cutaneous squamous cell carcinoma (HNcSCC) with parotid metastasis (P+) and to evaluate the quality of life (QoL) of patients who received END or ENI. Patients with P+ HNcSCC were retrospectively enrolled. The impact of observation, END, and ENI on regional control (RC) and overall survival (OS) was analyzed using Cox proportional hazards model with presentation via hazard ratio (HR) with a 95% confidence interval (CI). QoL was evaluated using the University of Washington Quality of Life questionnaire. A total of 134 patients were included in our analysis. In the Cox model for RC, both END and ENI had decreased HRs of 0.27 (95% CI: 0.15-0.69) and 0.34 (95% CI: 0.18-0.86), respectively, in comparison with observation. In the Cox model for OS, both END (p = 0.001, HR: 0.22, 95% CI: 0.10-0.72) and ENI (p = 0.006, HR: 0.30, 95% CI: 0.17-0.83) were superior to observation. In patients with three or more positive parotid lymph nodes, END resulted in significantly better RC (p < 0.001) and OS (p = 0.001) compared with ENI. The two groups were found to be comparable in all 12 domains of the University of Washington Quality of Life questionnaire. In the neck management of P+ HNcSCC, observation is not recommended. END is the preferred option, but ENI is an alternative method without compromise to survival or QoL, except in cases with three or more metastatic parotid lymph nodes.

Parotid gland metastasis of lung cancer: A case report

Metastases to the parotid gland generally arise from malignant tumours of the head and neck. Lung cancers with parotid metastasis represent a relatively rare situation, the percentage of which is still unknown. We report a case of a 55-year-old chronic smoker who presented with a right parotid mass revealing a primary bronchial adenocarcinoma.

Results of surgical treatment of lymph node metastases in patients with cutaneous squamous cell carcinoma of the head and neck

IntroductionOut of all cutaneous squamous cell carcinomas originating in the head and neck (HNCSCC), 2–4% are associated with parotid or cervical lymph node metastasis. The aim of this study is to analyse the prognostic factors of patients with HNCSCC with lymph node involvement treated surgically. Additionally, we aim to compare the prognostic capacity of the classification of these patients according to the 8th edition of the TNM, and an alternative classification proposed by O'Brien et al. Patients and methodsRetrospective review of 65 patients with HNCSCC with lymph node metastasis treated surgically during the period 2000–2020. ResultsDuring the study period we carried out 13 neck dissections and 52 parotidectomies + neck dissection in patients with lymph node metastases from a HNCSCC. The great majority of patients (89.2%) received post-operative radiotherapy. The 5 year disease-specific survival was 69.9%, and the overall survival it was 42.8%. The classification proposed by O'Brien et al., based on the parotid or cervical location of the lymph node metastases, and the size and number of the metastatic lymph nodes, had a better prognostic capacity than the TNM classification. ConclusionsThe surgical treatment of lymph node metastases in patients with HNCSCC achieved a high disease control. The classification based on the location, size and number of lymph node metastases proposed by O'Brien et al had better prognostic capacity than the TNM classification.

Parotid Metastasis from Squamous Cell Carcinoma: Surgical Resection and Microsurgery Reconstruction: a case report

Introduction and importance: Squamous cell carcinoma (SCC) accounts for approximately 20% of nonmelanoma skin cancers, with a significant proportion arising in the head and neck region. Up to 5% of these lesions’ present nodal metastases, particularly to the parotid gland, attributed to the extensive lymph nodes in and around the gland. Treatment typically involves surgical resection, including cervical lymph node dissection, with adjuvant radiation therapy recommended in select cases. Reconstruction using a microsurgery-assisted free anterolateral thigh flap is valuable in complex cases such as SCC with parotid metastasis, providing optimal reconstruction outcomes and improving patient quality of life. Case presentation: We presented a 68-year-old woman with squamous cell carcinoma (SCC) in the left parotid gland and metastasis. The patient had a history of SCC in the left zygomatic region. The parotid lesion exhibited rapid growth and was associated with various symptoms, including eye pain, hearing loss, tinnitus, and headache. Discussion: Treatment involved left extended total parotidectomy, ipsilateral supraomohyoid neck dissection, and reconstruction with a microsurgery-assisted free anterolateral thigh flap. Conclusion: Comprehensive care, from early diagnosis to skilled surgery, is vital for improving outcomes in squamous cell carcinoma, particularly with parotid metastases.

Parotid Metastasis from Squamous Cell Carcinoma: Surgical Resection and Microsurgery Reconstruction: a case report

Parotid Metastasis from Squamous Cell Carcinoma: Surgical Resection and Microsurgery Reconstruction: a case report

Resultados del tratamiento quirúrgico de las metástasis ganglionares en pacientes con carcinomas escamosos cutáneos de cabeza y cuello

IntroductionOut of all cutaneous squamous cell carcinomas originating in the head and neck (HNCSCC), 2%-4% are associated with parotid or cervical lymph node metastasis. The aim of this study is to analyse the prognostic factors of patients with HNCSCC with lymph node involvement treated surgically. Additionally, we aim to compare the prognostic capacity of the classification of these patients according to the 8th edition of the TNM, and an alternative classification proposed by O’Brien et al. Patients and methodsRetrospective review of 65 patients with HNCSCC with lymph node metastasis treated surgically during the period 2000-2020. ResultsDuring the study period we carried out 13 neck dissections and 52 parotidectomies +neck dissection in patients with lymph node metastases from a HNCSCC. The great majority of patients (89.2%) received post-operative radiotherapy. The 5year disease-specific survival was 69.9%, and the overall survival it was 42.8%. The classification proposed by O’Brien et al., based on the parotid or cervical location of the lymph node metastases, and the size and number of the metastatic lymph nodes, had a better prognostic capacity than the TNM classification. ConclusionsThe surgical treatment of lymph node metastases in patients with HNCSCC achieved a high disease control. The classification based on the location, size and number of lymph node metastases proposed by O’Brien et al. had better prognostic capacity than the TNM classification.

Elective parotidectomy and neck dissection are not beneficial in cutaneous squamous cell carcinoma of the head

ObjectiveCutaneous Squamous Cell Carcinoma (cSCC), a tumor with a significantly increasing incidence, is mostly diagnosed in the head region, where tumors have a worse prognosis and a higher risk of metastases. The presence of metastases reduces specific five-year survival from 99% to 50%. As the risk of occult metastases does not exceed 10%, elective dissection of the tributary parotid and neck lymph nodes is not recommended. MethodsWe retrospectively analyzed a group of 12 patients with cSCC of the head after elective dissections of regional (parotid and cervical) nodes by means of superficial parotidectomy and selective neck dissection. ResultsWe diagnosed occult metastases neither in the cervical nor parotid nodes in any patient. None were diagnosed as a regional recurrence during the follow-up period. ConclucionOur negative opinion on elective parotidectomy and neck dissection in cSCC of the head is in agreement with the majority of published studies. These elective procedures are not indicated even for tumors showing the presence of known (clinical and histological) risk factors for lymphogenic spread, as their positive predictive value is too low. Elective parotidectomy is individually considered as safe deep surgical margin. If elective parotidectomy is planned it should include only the superficial lobe. Completion parotidectomy and elective neck dissection are done in rare cases of histologically confirmed parotid metastasis in the parotid specimen. Preoperatively diagnosed parotid metastases without neck involvement are sent for total parotidectomy and elective selective neck dissection. Cases of clinically evident neck metastasis with no parotid involvement, are referred for comprehensive neck dissection and elective superficial parotidectomy. The treatment of concurrent parotid and cervical metastases includes total conservative parotidectomy and comprehensive neck dissection. Level of evidenceHow common is the problem?Step 4 (Case-series)Is this diagnostic or monitoring test accurate? (Diagnosis)Step 4 (poor or non-independent reference standard)What will happen if we do not add a therapy? (Prognosis)Step 4 (Case-series)Does this intervention help? (Treatment Benefits)Step 4 (Case-series)What are the COMMON harms? (Treatment Harms)Step 4 (Case-series)What are the RARE harms? (Treatment Harms)Step 4 (Case-series)Is this (early detection) test worthwhile? (Screening)Step 4 (Case-series)

TRU-CUT ISOLATED PAROTID METASTASIS FROM RENAL CELL CARCINOMA: AN UNUSUAL PRESENTATION AND REVIEW OF LITERATURE

Background: Renal cell carcinoma with isolated metastasis to the parotid gland is extremely rare. Slow growth, low level of suspicion and negative Fine needle aspiration cytology (FNAC) often delay the diagnosis. A high level of suspicion of metastatic disease from a specic site is important, otherwise can be missed for a benign swelling leading to delayed treatment and poorer prognosis. A 59-year-old Case presentation: male presented with a swelling in the right preauricular area 5 years post right radical nephrectomy for right renal cell carcinoma (RCC). The examination was suggestive of a benign swelling. FNAC was done twice, which was inconclusive. A Tru-cut biopsy of the lesion revealed metastatic RCC. MRI revealed a dumbbell type of tumor extending deep into the gland and encasing vessels. PET-CT was negative for metastasis to the rest of the body. The patient received targeted therapy followed by radiation therapy with imaging showing non-progression of the disease. Conclusion: Metastatic disease should be considered whenever a parotid mass is detected in patients with an RCC history. Examination ndings can be misleading; hence dedicated imaging is critical. Small parotid metastasis can be cured with surgery. A combination of chemotherapy and radiation therapy can palliate the unresectable disease.

Cutaneous squamous cell carcinoma with secondary parotid metastasis: a case report

Majority of cutaneous squamous cell carcinoma (cSCC) originate in the head and neck region, with 1-3% have been found to have parotid or periparotid lymph nodes metastases. The significance of secondary parotid metastases from cSCC lies in its propensity of cervical lymph node spread and distant metastases leading to a dismal prognosis, and therefore the importance of early diagnosis and prompt treatment. An 85-year-old gentleman with prior history of right temporal squamous cell carcinoma (SCC) presented with a new onset left cheek cSCC. He underwent complete excision with clear margin. Four months following initial surgery, he developed ulcerative mass at left angle of mandible. CT scan revealed an underlying left parotid gland tumor, which was confirmed to be SCC by fine needle aspiration cytology (FNAC). He was then surgically treated with nerve-sparing total parotidectomy, modified radical neck dissection, soft tissue reconstruction using free anterolateral thigh fasciocutaneous flap and adjuvant radiotherapy with satisfactory outcomes. Although rare, metastatic cutaneous SCC to parotid gland represents a unique group of locally advanced cutaneous SCC. Multimodal treatment approach consisting of total parotidectomy, ipsilateral neck dissection and adjuvant radiotherapy has been shown to improve the locoregional control of the disease and limit the propensity to distant metastasis.

Parotid Metastasis in a Case of Papillary Thyroid Carcinoma: Case Report and Review of Literature.

Papillary thyroid carcinoma (PTC) is the most common differentiated thyroid neoplasm. Common sites of regional and distant metastasis includes lymph nodes, lungs and bone. 51year old female patient who was a known case of PTC with a history of multiple surgeries, radioactive iodine therapy (RAI) and oral chemotherapy presented with a painful right parotid mass. PET scan demonstrated FDG avid lesions in the right parotid gland, cervical lymph nodes and other distant sites. Cytology report showed features of metastatic PTC. Patient underwent extended total parotidectomy with facial nerve resection, skin and masseter muscle resection and extended radical neck dissection. Final histopathology (HPE) report showed metastatic papillary carcinoma thyroid. Patient is currently on oral chemotherapy and on regular follow up. PTC rarely metastasizes to parotid gland and such cases have to be treated with surgery alone or with a combination of surgery and RAI based on tumour burden.

Retinoblastoma with Isolated Parotid Gland Metastasis: A Report of 2 Cases with Review of Literature.

Retinoblastoma, the most common primary intraocular malignant neoplasm in young children, show frequent metastasis to lymph nodes, central nervous system and bones. However, retinoblastoma metastasizing to parotid gland is very rare. We here present 2 cases of isolated parotid gland metastasis in two children with unilateral retinoblastoma. Case 1 was a one-year-old child presenting with left globe lesion which was diagnosed as Retinoblastoma. Post chemotherapy, enucleation was done which on histopathology examination showed retinoblastoma with scleral invasion and anterior chamber seeding. On 3 month follow up, patient presented with left parotid swelling. He underwent Fine needle aspiration cytology (FNAC) and Core needle biopsy which confirmed retinoblastoma metastasizing to parotid following which superficial parotidectomy was done as it was a solitary hotspot on PET-CT followed by localized radiotherapy and chemotherapy. While case 2, a 6-year-old child presented with left parotid swelling with a history of undergoing enucleation 3 months earlier in an outside hospital; Enucleation slides were reviewed in addition to patient undergoing FNAC and Biopsy from parotid swelling, all of which were consistent with Retinoblastoma metastasizing to parotid; This patient was lost to follow up; Although rare with only a few case reports in literature, both the pathologist and the clinician should be aware of retinoblastoma metastasizing to parotid, which when diagnosed and treated promptly has overall better prognosis in the cases reported so far.

Metastatic parotid gland malignancy: A preliminary study in an eastern Chinese population

ObjectiveThis study aimed to determine the incidence and clinicopathological patterns of metastatic carcinoma of the parotid gland. MethodNinety patients with parotid gland metastases admitted to our hospital between January 2003 and December 2018 were included in this study. Clinical and pathological data were obtained from the medical records and follow-ups. Kaplan-Meier analysis was used to assess overall survival of patients. ResultsAmong the 90 patients, parotid gland metastases originated from the head and neck in 86 (95.6%), from non-head and neck in 4 (4.4%), from the oral cavity in 30(33.3%), and from the eyelid in 21 (23.3%). Among the 85 cases with parotid gland lymph node metastasis, 45 (52.9%) were diagnosed with extra-lymph node metastasis. The capsule of the parotid lymph nodes was thinner than that of the cervical lymph nodes (P < 0.05). Hematogenous metastases to the parotid gland (only five cases) were rare, mainly from the non-head and neck malignancies. Patients with oral squamous cell carcinoma and meibomian adenocarcinoma with parotid metastatic disease had poorer overall survival (P < 0.05). ConclusionEastern China population analysis showed that parotid gland metastases usually arise from oral squamous cell carcinoma and eyelid, but rarely from cutaneous squamous cell carcinoma. Most cases metastasize to the parotid lymph nodes via the lymphatic system and are prone to extranodal extension with little or no facial nerve involvement. These findings have important implications for the treatment of metastatic parotid malignancies.

EP14.01-003 Parotid Metastases from Primary Lung Cancer: Case Series and Systematic Review on the Clinical Features

Most parotid metastases have been reported to come from head and neck; however, cases metastasized from lung are extremely rare. Missed diagnose and misdiagnose occurred quite a few. Thus, accurately identify the clinical features of parotid metastasis of lung cancer do matters. However, current studies about this issue are mostly case reports, little is known about the detailed and systematic aspects.

72-Year-Old Man With Puffy Fingers and Raynaud Phenomenon

A 72-year-old man, recently diagnosed with squamous cell carcinoma of the skin with left parotid gland metastasis (status postparotidectomy and radiation), hypothyroidism, hypertension, and allergic rhinitis presented with puffy fingers and Raynaud phenomenon (RP). Medications included acetaminophen, oxycodone, lisinopril, loratadine, senna, and multivitamins.

Clinical Analysis of 16 Distant Metastatic Retinoblastoma Cases with Event-Free Survival.

AimThis study aimed to summarize the clinical characteristics, treatment, and outcomes of distant metastatic retinoblastoma with event-free survival.DesignRetrospective interventional case series.MethodsWe screened patients with retinoblastoma who survived without events after the comprehensive treatment of distant metastases from June 2015 to February 2021 and collected information regarding their basic characteristics, diagnosis, and treatment. All patients received systemic intravenous chemotherapy. Other treatments included surgical treatment, radiotherapy, intrathecal chemotherapy, and autologous stem cell transplantation.ResultsAmong 780 hospitalized patients with retinoblastoma in the pediatric ward, a total of 94 patients with retinoblastoma were diagnosed with distant metastases, and 16 patients with distant metastatic retinoblastoma who survived more than 6 months without events were screened, including eight male and eight female patients. The median age of onset was 29 (range, 11–120) months. Among the 16 patients, central nervous system metastasis (8/16), bone metastasis (8/16), bone marrow infiltration (4/16), lymph node metastasis (4/16), and parotid gland metastasis (3/16) were presented. All patients received treatment for more than 6 months, completed their regimen by February 2021, and survived without events. The median survival time after the onset of retinoblastoma was 50.5 (range, 23–102) months, the median survival time after metastasis was 43.5 (range, 16–71) months, and the median event-free survival was 29.0 (range, 6–59) months.ConclusionMetastatic retinoblastoma may benefit from comprehensive treatments including systemic intravenous chemotherapy and hematopoietic stem cell transplantation. However, recurrence after treatment still needs attention, and patients in complete remission still need long-term follow-up.