Subperiosteal ganglionic cyst of the iliac wing.
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Bone Cysts↗
Biomedical subjects
S Nadas
Publications and source records attributed to S Nadas.
Concha bullosa: frequency and appearances on CT and correlations with sinus disease in 308 patients with chronic sinusitis.
The purposes of this study were to determine the prevalence of concha bullosa in patients with chronic sinusitis, to assess the origin of the pneumatisation (from the anterior or posterior ethmoid cells), and to evaluate the significance of the concha bullosa in the genesis of inflammatory sinus disease. We reviewed the CT studies of 308 patients with chronic sinusitis, assigning four grades of pneumatisation: absent, small, medium and large. Unilateral or bilateral concha bullosa was found in 164 patients (53%). In 79% of cases it was pneumatised via the posterior ethmoidal cells and in 21% via the anterior. A small concha bullosa was associated with abnormalities of the maxillary sinus, ethmoidal cells and ostiomeatal unit respectively in 49%, 28% and 34% of cases, whereas with a large concha bullosa the association was 55%, 36% and 41% respectively on the ipsilateral side and 55%, 32% and 41% on the contralateral side. The usually accepted hypothesis that the concha bullosa may contribute to the pathogenesis of inflammatory sinus disease seems doubtful.
Adult↗
[Radiation doses delivered to the critical organs during radiological studies of chronic sinusitis. Comparison between TDM and standard radiographies].
Computed tomography (CT) is the gold standard for exact delineation of inflammatory sinus disease, especially before endoscopic surgical treatment. Thermoluminescent dosimetry studies were performed on a Rando humanoid phantom to compare radiation doses used in sinus examinations. Radiation doses were determined for lens, thyroid gland, condylar marrow and brain. Studies included standard sinus views (Waters, Caldwell, Hirtz and lateral), CT scan in axial and coronal planes and in planes determined by the axis of the naso-frontal duct, CT low-dose. Lens received doses of 7.4 mGy, 33.6 mGy, 32.2 mGy, 15.0 mGy, respectively, for standard sinus views, CT scan axial and coronal planes, CT scan in planes determined by the axis of the naso-frontal duct and low-dose CT, thyroid gland received doses of 10.1 mGy, 27.2 mGy, 3.9 mGy and 1.4 mGy respectively, condylar marrow received doses of 2.0 mGy, 32.0 mGy, 20.4 mGy and 7.2 mGy respectively and brain received doses of 2.3 mGy, 14.2 mGy, 6.0 mGy and 2.0 mGy. The radiation doses from CT low-dose are slightly higher than standard sinus views but the health benefits are also higher. Therefore, the authors recommend the use of CT low-dose in paranasal sinus studies.
Bone Marrow↗
Predisposing factors in obstetrical fractures.
To compare various obstetrical methods with different types of obstetrical fractures, 29 neonates with fractures were evaluated retrospectively. Plain films of skull, limbs and chest were obtained. Transfontanellar ultrasonography was performed in one case and a computed tomographic scan of the skull in two. We reviewed 12 fractures of long bones, 7 fractures of the skull, and 10 fractures of the clavicle. Ten fractures occurred during caesarean sections and 11 in vaginal delivery requiring medical assistance. Depressed skull fractures were associated with manoeuvres and the use of forceps during delivery. Fractures of the long bones were associated with caesarean section, breech delivery with assistance and low birth weight. All fractures were treated conservatively except for skull fractures with depression of more than 2 cm. Early consolidation occurred in all fractures of long bones. The long-term follow-up of all fractures but one revealed no persisting disability. The belief that obstetrical fractures occur primarily in large babies or after breech delivery is not supported by this study.
Adult↗
Obstetric fractures.
The purpose of this study was to determine the risk factors predisposing to an obstetric fracture, and their long-term outcome. We reviewed 28 obstetric fractures treated in the County of Vaud, Switzerland, between 1976 and 1989. There were 12 fractures of long bones, 10 clavicles and 6 depressed skull fractures. The belief that obstetric fractures occur in large babies or after breech deliveries is no longer valid. The common risk factors of these fractures are obstetric maneuvers during delivery (75% of cases), especially Cesarean sections (35%), prolonged labor (33%), and prematurity (25%). Cephalic presentation (64.2% of cases) is more frequent than breech position (32.1%). Weight, size, age of gestation, age of the mother, parity, gestity, and time of delivery cannot be considered as risk factors for obstetric fractures. For each type of fracture some specific risk factors are pointed out: maneuvers at birth for depressed skull fracture, Cesarean section, breech delivery with assistance and low birth weight for the fractures of long bones. All fractures were treated conservatively, except for skull fractures with a depression of more than 2 cm. Early consolidation is achieved within 2 weeks. Long-term prognosis for obstetric fractures is good without sequelae.
Birth Injuries↗