Endolymphatic sac tumors: experience of three cases.

OBJECTIVES: To describe the clinical features, radiological findings, treatment and outcomes of three cases of endolymphatic sac tumors (ELST). METHODS: Retrospective analysis of three cases of ELST. RESULTS: The first patient had a large ELST invading the labyrinth after a long history of vertigo. He was recurrence-free 1 year after retrolabyrinthine surgical removal. In the second case, an acute peripheral facial nerve paralysis associated with ipsilateral sensorineural hearing loss led to the diagnosis. A translabyrinthine approach was used to remove the tumor, which recurred three times over 10 years. The third patient was a young woman suffering from von Hippel-Lindau (VHL) disease and referred for a sudden sensorineural hearing loss due to an intralabyrinthine hemorrhage secondary to a 2 mm-large endolymphatic sac-confined ELST. Her hearing was totally lost after the deafness recurred 1 month after this first episode. MRI demonstrated a small bilateral ELST. The patient refused surgery on the deaf side. CONCLUSION: ELST are difficult to diagnose due to the wide variety of their presentations. Patients with ELST should be screened for VHL disease. Dural invasion and tumor hypervascularization increase the risk of local recurrences after surgery. Early surgical resection may lead to complete tumor removal and inner ear preservation.

Characterization of fungus ball CT-hyperdensities within maxillary and sphenoid sinuses.

OBJECTIVES: CT-scan hyperdensities (HD) are described in more than 60% of all paranasal sinus fungus ball (FB) cases. Two types can be distinguished according to their density: calcium and metal types. We aimed to establish the prevalence and density of the HD observed in sphenoid and maxillary sinus FB and their relation to dental factors. METHODS: This retrospective study included 64 patients operated in a tertiary referral center for unilateral maxillary or sphenoid FB diagnosed by histology or mycology. Pre-operative CT scans were analyzed by three independent observers (two ENT and one radiologist). RESULTS: There were 45 maxillary FB and 19 sphenoid FB. 63 FB showed HD. Metal-type HD were observed in 28 maxillary FB but not in sphenoid sinuses. Among maxillary FB, the prevalence of endodontic treatment was significantly more significant on the FB side than on the healthy side (p = 0.02). The prevalence of endodontic treatment on the pathological side was more significant in the metal-type group than in the group without metal-type HD (p = 0.01). Isolated calcium-type HD were evidenced in 17 maxillary FB and 18 sphenoid FB (p = 0.019). CONCLUSION: This study highlights the existence of two different types of HD in FBs of the paranasal sinuses with an association between metal-type HD and endodontic treatments.

Renal cell carcinoma metastatic to the sinonasal cavity: A review and report of 8 cases.

Renal cell carcinoma (RCC) metastatic in the sinonasal cavity is rare. In many cases, it represents the initial presentation of RCC. We conducted a retrospective chart review to report the clinical presentation, imaging, and treatment of RCC metastases in the sinonasal cavity at two tertiary care referral centers. Our population was made up of 8 patients-6 men and 2 women, aged 55 to 86 years (mean: 66.9; median: 63.5)-who had been diagnosed with cancer in the sinonasal cavity. The most common complaints were epistaxis, nasal obstruction, and diplopia. Cancers were located in the ethmoid sinus (n = 3), nasal cavity (n = 2), sphenoid sinus (n = 2), and maxillary sinus (n = 1). Local treatment involved resection and adjuvant radiotherapy in 4 patients, surgery alone in 2 patients, and radiotherapy alone in the other 2. The lesion was embolized before surgery in 4 cases. We also performed a critical review of similar published cases. Our literature review covered 53 cases of RCC metastatic to the sinonasal cavity, including ours. Metastases were the first presentation of RCC in 24 of these cases (45.3%); in our series, the metastases led to the diagnosis of the primary RCC in 3 cases (37.5%). In the 53 reported cases, metastatic resection was performed on 35 patients (66.0%). Survival data were available for 22 of these operated patients, and 17 of them achieved a complete local response. Adjunctive radiotherapy was not associated with a better local response. Overall survival was significantly better in patients who had an isolated metastasis rather than multiple metastases (p = 0.013). There was no difference in overall survival between patients whose metastasis represented the initial presentation of RCC and those whose metastasis did not (p = 0.95). We recommend that sinonasal metastasis be suspected in the event of unilateral nasal bleeding or nasal obstruction in patients diagnosed with RCC. Embolization may prevent abundant bleeding during removal. Surgery may improve the quality of life of these patients while decreasing nasal obstruction and bleeding.

Multicenter assessment of exclusive endoscopic endonasal approach for the treatment of 53 olfactory neuroblastomas.

BACKGROUND: Given the particularities of olfactory neuroblastoma (ONB) and the lack of studies on the subject, a multicenter collaborative study was conducted to assess treatment strategy. METHODS: Fifty-three patients with ONB were included from the French Rare Head and Neck Cancer Expert Network (REFCOR) database: 16T1, 8T2, 19T3, and 10T4. All cases were treated endoscopically with skull base removal and repair in 26 cases (49%) and without external craniotomy. RESULTS: The overall survival (OS) and disease-free survival (DFS) rates at 5 years were 87% and 71%, respectively, with mean follow-up of 45.4 ± 26.5 months. The complication rate was 18.8% with 4 cases of meningitis. Pathological analysis showed positive margins in 26.8%, notably on the dura-mater and periorbita, without impairment of OS or DFS. Forty-eight patients received adjuvant radiotherapy on T ± N. Ten patients had a recurrence (18.9%). Six patients died of their disease. Prophylactic neck irradiation seemed to reduce the recurrence rate. CONCLUSION: Exclusively endoscopic treatment proved efficient and reliable in a large controlled series.

Assessment of Abdominal Fat Graft to Repair Anterior Skull Base after Malignant Sinonasal Tumor Extirpation.

OBJECTIVE: Adult abdominal fat, which is known to contain pluripotent stem cells, is frequently used to treat cerebrospinal fluid leak. The aim of this study was to assess the efficacy and reliability of abdominal fat graft to close large skull base defects after extirpation of malignant sinonasal tumors. STUDY DESIGN: Case series with chart review performed between 2009 and 2014. SUBJECTS AND METHODS: Twenty-nine cases were included of consecutive patients who were suffering from malignant sinonasal tumors, operated by an endoscopic endonasal approach with anterior skull base extirpation and surgically induced cerebrospinal fluid leak. Skull base was repaired by 1 layer of "en bloc" autologous fat graft used as a plug in the onlay position. Epidemiologic data, medical history, defect size, length of hospitalization, and morbidity were analyzed. RESULTS: Radiotherapy was given pre- and postoperatively in 4 (13.8%) and 23 (79.3%) patients, respectively. Mean defect size was 4.47 ± 2.9 cm(2) (range, 0.24-9.1 cm(2)). Mean operative time was 210 ± 86 minutes. Mean length of hospitalization was 8.6 ± 3.7 days and 4.9 ± 2 days in the intensive care unit. No lumbar drain was used in this study. There was 1 case of cerebrospinal fluid leak (3.5%) and 2 cases of meningitis (6.9%), which resolved after medical treatment. Mean follow-up was 17 ± 13 months (range, 3-53 months). CONCLUSION: Abdominal fat graft is a safe and reliable material to close the anterior skull base after extirpation of malignant sinonasal tumors.

ß-Tricalcium Phosphate Implants in the Surgical Treatment of Empty Nose Syndrome.

The objective of this study was to assess the efficacy and morbidity of a ß-tricalcium phosphate implant in the treatment of empty nose syndrome after turbinectomy. Only patients with a history of inferior turbinectomy and a complaint of permanent paradoxical nasal obstruction were included. ß-Tricalcium phosphate ceramic implants were implanted under the mucoperiosteal plane of the lateral nasal wall to replace the head of the inferior turbinate. Symptoms and quality of life were assessed by 2 questionnaires: the Nasal Obstruction Symptom Evaluation and Rhinosinusitis Quality of Life. Fourteen patients were included. The mean follow-up was 19.4 ± 13.4 months. Scores for the Nasal Obstruction Symptom Evaluation and Rhinosinusitis Quality of Life (frequency, bothersomeness, and impact) significantly improved after surgery (respectively, 73.9 ± 21.8 to 34.6 ± 28.6, 44.6 ± 17.1 to 34.8 ± 20.3, 43.6 ± 22.4 to 70.7 ± 21.5, and 59.9 ± 21.1 to 27.2 ± 25.3; P < .05). The use of ß-tricalcium phosphate seems efficient to repair empty nose syndrome by endonasal microplasty and shows a low complication rate.