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Dive into the research topics where Alexander Niv is active.

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Featured researches published by Alexander Niv.


International Journal of Pediatric Otorhinolaryngology | 1999

Otogenic lateral sinus thrombosis in children

Daniel M. Kaplan; Mordechai Kraus; Marco Puterman; Alexander Niv; Alberto Leiberman; Dan M. Fliss

INTRODUCTION The clinical picture of lateral sinus thrombosis (LST) has changed with the advent of antibiotics, as have the utility of various diagnostic tests. LST may appear in children as a complication of acute otitis media, but nowadays it is more frequently encountered in adults with long-standing chronic ear disease. METHOD A retrospective study of all the pediatric patients with LST between 1982 and 1997. RESULTS Thirteen cases of LST were diagnosed and treated by our department. In six cases, LST was due to acute otitis media and in the remaining cases it was due to chronic otitis media. Headache, fever, aural discharge and mastoid tenderness were the most frequent findings in these patients and four patients were initially diagnosed with meningitis. In the majority of the patients, LST was accompanied with other intracranial complications, such as perisinus abscess, brain abscess and meningitis. One patient with multiple brain abscesses, unresponsive to several drainage procedures, died. The other patients recovered and have since been followed-up as out-patients. CONCLUSION LST may be difficult to diagnose due to previous antibiotic treatment and to the overlap of clinical findings with other entities such as meningitis. Despite the value of modern imaging techniques in the investigation of the disease, a high index of suspicion based on the clinical picture is warranted. Our results are consistent with those of other recent studies, who found that mortality of LST has dropped below 10%.


International Journal of Pediatric Otorhinolaryngology | 1998

Outpatient management of acute mastoiditis with periosteitis in children

Alexander Niv; Michael Nash; J. Peiser; Ron Dagan; Menachem Einhorn; Alberto Leiberman; Dan M. Fliss

Children with acute mastoiditis with periosteitis are conventionally hospitalized for parenteral antibiotics and/or surgical treatment. However, if possible, effective and safe outpatient treatment is desirable. During a 36-month period, outpatient parenteral antibiotic therapy (once daily i.m. ceftriaxone) was evaluated in 32 children with acute mastoiditis, with clinical evidence of periosteitis. Inclusion criteria included otomicroscopic evidence of acute otitis media (AOM), displacement of the pinna, retroauricular swelling, erythema and tenderness. The treatment consisted of wide myringotomy and administration of i.m. antibiotics. Daily visits, by a combined team of an otolaryngologist and pediatric infectious disease specialist, were considered essential. Fourteen children (43%) were treated initially in the hospital (and subsequently as outpatients) and 18 (57%) children were treated entirely as outpatients. Mean duration of outpatient treatment was 7 days (range: 4-10). The overall clinical cure rate was 96.8%. One child underwent simple mastoidectomy. No serious side effects were observed. Our data suggests that many children with acute mastoiditis with periosteitis can be managed successfully and safely as outpatients by a combined team of otolaryngologists and infectious disease specialists.


Journal of Laryngology and Otology | 2000

Identification and typing of human papillomavirus (HPV) in squamous cell carcinoma of the oral cavity and oropharynx.

Alexander Niv; Netta Sion-Vardi; Albert Gatot; Michael Nash; Dan M. Fliss

Recent epidemiological research has raised the possibility of a connection between viral infection by the human papilloma virus (HPV) and the existence of squamous cell carcinoma of the oral cavity and oroharynx (SCCa). Some 60 subtypes have been identified to date, and specific subtypes are associated with lesions or infections at specific tissue sites. Twenty-three patients with SCCa of the oral cavity were studied for the presence of HPV in their tumours. HPV DNA (all type 16) was isolated from four specimens (17.3 per cent) using the Polymerase Chain Reaction (PCR) method. The four patients were all over age 50, and had advanced tumours (two T3 and two T4) that originated in the oropharynx. Our data supports other reports in the literature, demonstrating the presence of HPV DNA type 16 within cells from oropharyngeal SCCa. We conclude that the PCR method is a useful and reliable method for the detection of HPV DNA within tumour cells.


International Journal of Pediatric Otorhinolaryngology | 2008

A prospective randomized double-blind trial of fibrin glue for reducing pain and bleeding after tonsillectomy.

Nili Segal; Moshe Puterman; Eran Rotem; Alexander Niv; Daniel M. Kaplan; Mordechai Kraus; Hilel Brenner; Michael Nash; Asher Tal; Alberto Leiberman

OBJECTIVES Varying surgical techniques as well as a large selection of analgesics and other medications have been evaluated over the years in the hopes of reducing post-tonsillectomy pain. Several publications in recent years have demonstrated the efficacy of fibrin glue in reducing post-tonsillectomy bleeding and pain. The objectives of this study were to evaluate the effect of fibrin glue on pain and bleeding after tonsillectomy. STUDY DESIGN A prospective randomized double-blind study was performed on 168 consecutive patients undergoing tonsillectomy for obstructive sleep apnea and chronic tonsillitis. METHODS Patients were randomly assigned to the treatment protocol. In the study group, the tonsillar beds were coated with fibrin glue (Quixil, OMRIX biopharmaceuticals) at the end of the operation. Patients in the controlled group underwent tonsillectomy without the use of fibrin glue. The patients were then monitored for postoperative bleeding, and a patient-based pain assessment instrument was used to evaluate pain, ability to eat and analgesics consumption for 10 days after surgery. RESULTS Ninety-six patients returned for postoperative follow up and filled in the questionnaire. As our medical center is the only hospital in the southern district of Israel and we hospitalize every person who presents with post-tonsillectomy bleeding, we can assume that any patient from either group who presented with post-tonsillectomy bleeding would be familiar to us. Analysis showed that no statistically significant differences relating to postoperative pain, bleeding, use of analgesics and postoperative eating resumption were detected between the patients treated with fibrin glue and controls. CONCLUSIONS We cannot substantiate a significant beneficial effect of fibrin glue in post-tonsillectomy pain control, prevention of bleeding or facilitating eating and thus find no indication for the routine use of fibrin glue in tonsillectomy.


International Journal of Pediatric Otorhinolaryngology | 1999

The use of standardized orbital ultrasound in the diagnosis of sinus induced infections of the orbit in children: a preliminary report.

Daniel M. Kaplan; David M. Briscoe; Albert Gatot; Alexander Niv; Alberto Leiberman; Dan M. Fliss

Infections of the orbit in children usually present as a complication of sinusitis and may result in blindness or even death. Orbital cellulitis (OC) and subperiosteal abscess (SPA) represent different pathologies within the spectrum of orbital infections. The differentiation between OC and SPA is important, since it implies two different therapeutic modalities. While SPA is usually treated by incision and drainage and parenteral antibiotics, OC may be treated with antibiotics alone. Contrast enhanced CT scan is commonly used in the diagnosis of orbital infections, but does not always prove accurate in differentiating between these two conditions. MRI is superior to CT in the resolution of soft tissue pathology and may be more precise in such situations, but is less available imaging tool outside North America and Europe. There have been a few reports in the early 1980s on the use of standardized orbital ultrasound (SOU) in these two conditions. We have used SOU in seven children with sinus induced orbital infections--four with SPA and three with OC. We reviewed our experience in these patients and compared the imaging characteristics of OC and SPA on SOU with those of conventional imaging modalities, used in orbital infections. In four of the cases, CT scan was inconclusive, while SUO was diagnostic. In this preliminary report, we conclude that SOU may be useful in the diagnosis of orbital infections.


Acta Oto-laryngologica | 2006

Candida parotitis with abscess formation

Ella Even-Tov; Alexander Niv; Mordechai Kraus; Michael Nash

This report describes the case of an elderly, diabetic man who developed acute suppurative parotitis with abscess formation. The causative agent of parotid abscess was Candida albicans, which is an unusual cause of salivary gland pathology. The parotid gland is the salivary gland most commonly affected by inflammation. Acute parotitis occurs most often in elderly patients who are debilitated by systemic disease or are in a state of dehydration following major surgical procedures. Despite the high prevalence of oral candida carriage, there have been few previous reports of candida sialoadenitis in the literature. This is due to the toxicity of saliva to fungi under normal conditions. The diagnosis of candidiasis in our patient was made by culturing the purulent discharge from Stensens duct and by culture of the pus obtained at surgical drainage of the abscess. After incision and drainage, the patient was treated with intravenous and then oral fluconazole for a total of 4 weeks with complete resolution of his condition. This case is interesting in light of recent and ongoing investigations of salivary proteins as potential new antifungal agents.


Otolaryngology-Head and Neck Surgery | 2005

Management of bilateral benign paroxysmal positional vertigo.

Daniel M. Kaplan; Michel Nash; Alexander Niv; Mordechai Kraus

Objective To describe a series of patients with bilateral benign paroxysmal positional vertigo (BiBPPV), with respect to demographics, management, and outcome. Methods All patients who were identified and treated for BiBPPV in a previous 36-month period with a minimal follow-up period of 6 months were included. Patients were treated with Epleys maneuver (EM) on the side that was more symptomatic and that had a greater velocity and amplitude of tortional nystagmus. Patients were re-treated according to symptoms and findings on follow-up visits. Results Ten patients were identified with BiBPPV. Most patients complained of nonlocalized positional vertigo and unsteadiness. Four were males and 6 were females, and the mean age was 54 years. There was a positive history of recent head trauma in 4 of the patients. All patients recovered after performing a mean of 2.6 EMs during a 3-month period. One patient experienced unilateral recurrence and was re-treated successfully. Conclusion BiBPPV has typical characteristics and can be managed successfully with EM, performed on the more symptomatic side, followed by repeated treatments as needed. Ebm Rating: C


Otolaryngology-Head and Neck Surgery | 2007

The role of tinnitus evaluation tests in differentiating functional versus organic tinnitus.

Nili Segal; Max Puterman; Mark Shkolnik; Alexander Niv; Daniel M. Kaplan; Anat Kochva; Mordechai Kraus

Objective To evaluate the usefulness of tinnitus tests in differentiating patients with functional tinnitus from patients with organic tinnitus. Design One hundred ninety-six patients with tinnitus were divided into 2 groups. Forty-three patients, group 1, were not exposed to noise and had sensorineural hearing loss. One hundred fifty-three patients, group 2, were exposed to noise and claimed disability. All the patients underwent 4 tinnitus evaluation tests: pitch matching, intensity matching, residual inhibition, and tinnitus masking. We compared the results of the tinnitus tests between the 2 groups. Results Group 1 patients had a high-frequency, low-intensity tinnitus that tended to be more inhibited by narrow-band noise, was usually consistent with type I Feldman masking curve, and could be effectively masked. Group 2 patients had tinnitus that could not be characterized. The results of the tinnitus tests were significantly different between the groups. Conclusion Tinnitus tests may help us differentiate functional tinnitus that is not of cochlear origin from genuine tinnitus.


Journal of Laryngology and Otology | 2007

The vein of Labbe masquerading as an epidural abscess

Mordechai Kraus; I Shelef; Alexander Niv; Daniel M. Kaplan

The occipitotemporal vein (OTV) courses over the temporal lobe, connecting the superficial middle cerebral vein and the transverse sinus. This vein is rarely identifiable on computerized tomography (CT) scans and a large amount of contrast is needed to identify such a relatively small vessel. We present a 12-month-old male with acute coalescent mastoiditis and a subperiosteal abscess. An epidural abscess was suspected on pre-operative CT scan. No abscess was found on surgery. Based on the surgical finding, we determined that this misdiagnosis was due to a vascular variant, the occipitotemporal vein (vein of Labbe) that masqueraded as an abscess on the CT scan. Recognition of the vein of Labbe on CT scan is therefore essential for the appropriate management of otological and neurotological disease.


Indian Journal of Otolaryngology and Head & Neck Surgery | 2000

Desmoid tumor (aggressive fibromatosis) of the neck.

Alexander Niv; N. Sion-Vard; Michael Nash; Albert Gatot; J. Peiser; Dan M. Fliss

Desmoid tumors are histologically benign fibrous neoplasms arising from the musculoaponeurotic structures throughout the body. There is similar biological behaviour between benign fibrous proliferations and fibrosarcoma. These neoplasms have the tendency to locally invade and erode adjacent muscular tissue and bone. Within the head and neck area they also tend to encase vital structures. We present a case of a 28-year-old white female with a five-month history of a painful mass in her left posterior cervical triangle who was treated by excisional biopsy of the lesion with preservation of the accessory nerve and post-operative radiation. The histopathologic characteristics of desmoid tumors and treatment of these lesions are also reviewed.

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Daniel M. Kaplan

Ben-Gurion University of the Negev

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Alberto Leiberman

Ben-Gurion University of the Negev

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Dan M. Fliss

Tel Aviv Sourasky Medical Center

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Michael Nash

Ben-Gurion University of the Negev

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Mordechai Kraus

Ben-Gurion University of the Negev

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Albert Gatot

Ben-Gurion University of the Negev

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J. Peiser

Ben-Gurion University of the Negev

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Nili Segal

Ben-Gurion University of the Negev

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Ron Dagan

Ben-Gurion University of the Negev

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A. Katz

Ben-Gurion University of the Negev

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