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Biomedical subjects

M Depondt

Publications and source records attributed to M Depondt.

At least 19 recordsLinked to original sources
PubMed2001

Lymph node metastases from head and neck squamous cell carcinoma: MR imaging with ultrasmall superparamagnetic iron oxide particles (Sinerem MR) -- results of a phase-III multicenter clinical trial.

The aim of this study was to compare the clinical usefulness of ultrasmall superparamagnetic iron oxide (USPIO) MR contrast media (Sinerem, Guerbet Laboratories, Aulnay-sous-Bois, France) with precontrast MRI in the diagnosis of metastatic lymph nodes in patients with head and neck squamous cell carcinoma, using histology as gold standard. Eighty-one previously untreated patients were enrolled in a multicenter phase-III clinical trial. All patients had a noncontrast MR, a Sinerem MR, and surgery within a period of 15 days. The MR exams were analyzed both on site and by two independent radiologists (centralized readers). Correlation between histology and imaging was done per lymph node groups, and per individual lymph nodes when the short axis was > or = 10 mm. For individual lymph nodes, Sinerem MR showed a high sensitivity (> or = 88%) and specificity (> or = 77%). For lymph node groups, the sensitivity was > or = 59% and specificity > or = 81%. False-positive results were partially due to inflammatory nodes; false-negative results from the presence of undetected micrometastases. Errors of interpretation were also related to motion and/or susceptibility artifacts and problems of zone assignment. Sinerem MR had a negative predictive value (NPV) > or = 90% and a positive predictive value (PPV) > or = 51%. The specificity and PPV of Sinerem MR were better than those of precontrast MR. Precontrast MR showed an unexpectedly high sensitivity and NPV which were not increased with Sinerem MR. The potential contribution of Sinerem MR still remains limited by technical problems regarding motion and susceptibility artifacts and spatial resolution. It is also noteworthy that logistical problems, which could reduce the practical value of Sinerem MR, will be minimized in the future since Sinerem MR alone performed as good as the combination of precontrast and Sinerem MR.

Adult↗
PubMed1996

Benign paroxysmal positional vertigo of the horizontal canal.

OBJECTIVES: To review the clinical features, electronystagmography findings, the possible mechanism, and a possible therapeutic approach to benign paroxysmal positional vertigo (BPPV). METHODS: Sixty-three cases of BPPV of the horizontal canal type have been reviewed. It is characterised by horizontal nystagmus and an intense vertigo, provoked by rotation of the head in a supine patient. The horizontal nystagmus beats towards the ground on both sides, becomes more pronounced when lying on the pathological side, and then the nystagmus often changes direction. RESULTS: Forty-eight patients underwent electronystagmography. On the pathological side, the first phase nystagmus had a mean latency of three seconds and a mean duration of 31.6 seconds. Nystagmus inversion occurred in 36 patients after a nystagmus free interval. The mean second phase nystagmus duration lasted 33.4 seconds. On the healthy side, the nystagmus had a mean latency of 3.4 seconds and a mean duration of 39.5 seconds. Fatigue was seen in six patients. Simultaneous involvement of the posterior canal was present in 16 patients. A liberatory manoeuvre was successful in six patients. CONCLUSIONS: The liberatory manoeuvre should be tried in patients with horizontal canal vertigo. It should not be performed in patients with severe cervical arthrosis, vertebrobasilar insufficiency, or when the patient has neck pain during the manoeuvre.

Adult↗
PubMed1994

[Hearing loss following lumbar puncture: case report and literature study].

This report describes a patient with permanent hearing loss after spinal anesthesia. The literature is reviewed, particularly concerning incidence and possible causes. The incidence is surprisingly high and related to the size of the needle. The role of the cochlear aqueduct as a transmitter of a decreased fluid pressure in the subarachnoid space to the perilymph of the labyrinth is discussed.

Aged↗
PubMed1993

Lingual thyroid imaging.

Lingual thyroid is the most frequent benign mass found at the junction of the anterior two-thirds and posterior one-third of the tongue. MR has become the best non-invasive technique to make the diagnosis because it allows multiplanar imaging and provides the best soft tissue definition. Aberrant primitive vascular supply is often present and therefore angiography remains necessary because precise knowledge of the vascular supply is mandatory prior to embolisation, ligation, or operation.

Acute Disease↗
PubMed1992

[Medial maxillectomy in transitional papilloma].

Transitional Papilloma, the formerly inverted papilloma, is a rather rare neoplasm of the nasal cavity. Its origin is still debated. The only constant symptom is unilateral nose obstruction. This lesion is of considerable interest because of the recurrence tendency and its association with malignancy. Although a benign tumor, radical aggressive surgery is advocated. A medial maxillectomy is the treatment of choice. A sublabial incision gives excellent exposure without external facial scar.

Humans↗
PubMed1992

[Orbital involvement of sinusitis].

Sinusitis can spread to the orbital tissues. 'Preseptal' soft-tissue bacterial infections are relatively common during childhood and with appropriate antimicrobial therapy they usually resolve quickly. 'Orbital' soft-tissue infections, in contrast, are relatively rare and frequently cause serious morbidity. Four cases are presented. Symptomatology and pathogenesis are reviewed. Diagnostic procedures, especially CT-scan, are discussed and recommendations are given for medical and surgical management.

Abscess↗
PubMed1989

[Mesenchymal chondrosarcoma].

A case is presented of mesenchymal chondrosarcoma. This extremely rare tumor has a characteristic histology. The prognosis is poor. Radical surgery is essential. A lifelong follow-up is recommended.

Aged↗
PubMed1989

[Ototopic agents].

In treating ear disease every otolaryngologist is familiar with topical medications. The choice of the ideal agent for a given clinical situation may be difficult. In order to make this decision more easy, we overlook the composition of ear-drops. The most important disadvantages are ototoxicity, allergy and pain. The place of ototopical agents in otitis externa, otitis media and otomycosis is discussed.

Administration, Topical↗
PubMed1989

[Nasal endoscopic approach to sinus diseases].

The endoscopical endonasal surgery is in vogue. Today it has become a functional surgery. A thorough knowledge of the endonasal anatomy is difficult but essential. The antral ostium is reached after infundibulotomy, from which starts the inspection of the locoregional pathology.

Endoscopy↗
PubMed1988

Vascular tinnitus and arteriovenous meningeal fistula.

With the development of improved angiographic techniques, arteriovenous meningeal fistulas are being recognized more and more as an important cause of vascular tinnitus. Vascular tinnitus is generally considered to be objective and pulse-synchronous. This report concerns three cases of vascular tinnitus due to arteriovenous meningeal fistulas. They all could not or only hardly be objectified by auscultation and in one of them any pulse-synchronism was denied. The pathophysiology of vascular tinnitus is reviewed, followed by a more detailed discussion about the pathogenesis, the symptomatology and the radioanatomical aspects of arteriovenous meningeal fistulas. Finally, the report deals with the treatment of those fistulas.

Adult↗
PubMed1987

Spontaneous cerebrospinal fluid otorrhea.

A case of spontaneous cerebrospinal fluid otorrhea due to a congenital tegmen tympani defect is reported. The etiology and pathogenesis of cerebrospinal fluid otorrhea and of the spontaneous congenital form in particular is discussed, together with the clinical picture and the methods of diagnosis. Reviewing the literature, a middle ear exploration is considered to be the procedure of choice to ascertain the presence and determine the exact locus of the cerebrospinal fluid leak.

Bone Transplantation↗
PubMed1987

Nodular thyroid disease and cancer.

Different possibilities of solitary or multinodular involvement of the thyroid gland are described. Because of the broad spectrum of malignancy there exists a controversy and widespread divergence of opinion regarding the incidence, malignancy, classification and treatment of thyroid cancer.

Adenoma↗
PubMed1987

A survey of electro-oculography.

The vestibulometric examination in the ORL office is done by means of the registration of eye movements of vestibular origin, the electro-nystagmography. With the ENG-equipment one can perform electro-oculography, examining eye movements in general. EOG is quite helpful in neurologic diagnosis and important in ORL practice too. The adjustment of the ENG-equipment to EOG is explained, after some words on the physiology and the clinical examination of ocular motor function. Than a short survey is given of the abnormalities that may be met in EOG.

Electronystagmography↗
PubMed1986

[Wegener's granulomatosis in the ORL area].

Overlooking the literature, Wegener's granulomatosis often seems to have manifestations in the ear-nose-throat region, especially in the beginning. The usual clinical findings are mentioned, to put the attention of the ENT-surgeon on this affection. Indeed, by early recognition and proper treatment of this disease, the prognosis is clearly improving. A case-history is illustrating the clinical picture.

Adult↗
PubMed1986

[Role of air-CT-meato-cisternography in the diagnosis of acoustic neuroma].

The CT-meato-cisternography with air is at the moment the examination of choice in the diagnosis of the intra-canalicular acoustic neuroma. Every time there is a possibility of acoustic neuroma the air-CT-meato-cisternography has to be performed after the CT-scan was negative. The air-CT-meato-cisternography is easily performed on an outpatient basis and complications are never seen. Filtrated air seems to be the best contrast material.

Air↗
PubMed1982

[The Noonan syndrome].

Two cases of Noonan syndrome are observed. The Noonan syndrome is a Turner-like syndrome with normal chromosomal constitution. Essential criteria in diagnosing the syndrome are the facial expression (hyper-telorisme, low-set and malformed ears, micrognathie, fish-like mouth). The short webbed neck and the cubitus valgus. These children are rather small and mental retardation can be present, especially in comparison with their siblings. Associated cardiac malformations occur in approximately 50% of the cases. We insist on audiologic findings. One case has a hearing impairment due to a malformation of the middle ear, recognised radiologically. The other has a deafness of perception type. Yet, the familial occurrence of last patient makes it doubtful whether this hearing loss can be linked to the Noonan-syndrome.

Adolescent↗