Search PubMed⌕ Search

Biomedical subjects

A Nover

Publications and source records attributed to A Nover.

At least 19 recordsLinked to original sources
PubMed1990

[Abnormalities of the optic papilla in (peri)orbital encephaloceles--a contribution to the common pathogenesis of these abnormalities].

Eleven patients (6 female, 5 male) with unilateral (6) or bilateral (5) (peri)orbital encephaloceles (nasofrontal in 4 cases, naso-orbital in 3, spheno-orbital in 4), were ophthalmologically examined. All had normal anterior segments, but ipsilateral or bilateral anomalies of the optic nerve head such as coloboma, pits, morning glory syndrome, dysplasia, tilted disk syndrome, hypoplasia, or a persistent hyaloid artery. In regard to the pathogenesis of (peri)orbital encephaloceles associated with optic disk malformations a common clefting defect in the neuroectodermal and neurocristal midline structures of the head is postulated, taking place in the fourth to sixth week of development.

Abnormalities, Multiple↗
PubMed1989

[Compression pneumatocele of the lacrimal sac].

Case report on a 39-year-old man who for five years suffered from a recurrent, firm, crepitant swelling in the medial canthal region after coughing and sneezing. The swelling could be eliminated by digital compression. During a severe bout of sneezing a walnut-sized swelling suddenly occurred which could not be eliminated by compression. Echographic and intraoperative findings confirmed the diagnosis of a large, diverticulous pneumatocele that had compressed the lacrimal sac to such an extent that the entrapped air could not escape. Endoscopy of the nose revealed a wide nasolacrimal ostium, without a Hasner's valve. It was thus possible for air to flow back into the lacrimal drainage system from the nasal cavity.

Adult↗
PubMed1988

[Incidence and development of decentration of posterior chamber lenses implanted in the capsule sac].

A total of 284 patients with posterior chamber lenses (Sinskey-Kratz type) implanted in the capsular bag were re-examined on average 14 months after implantation. In 87% optical centration was excellent; 12% showed a minimal displacement exceeding 0.4 mm. In four patients (1%) gross displacement of the lens within the capsular bag was seen, caused by proliferation of residual lens cortex, asymmetric shrinkage of the capsular bag, and perforation of the bag by a lens loop.

Humans↗
PubMed1986

[Echographic findings and differential diagnosis in (peri-)orbital dermoid cysts].

The analysis of echographic findings in 34 patients with histologically proven dermoids revealed the following characteristic criteria: A scan sonography shows a roundish, regularly structured lesion of variably high reflectance bordered by a very high, double-peaked surface spike. There is a strong correlation between the degree of reflectivity, the consistency of the dermoid, and the composition of its contents. The B-scan shows a sharply outlined lesion with homogeneously distributed internal echos. Differential diagnoses are discussed on the basis of echographic findings and criteria.

Adolescent↗
PubMed1986

[Echographic differential diagnosis of post-traumatic motility disorders of the eye].

Following an analysis of echographic findings in 94 patients with posttraumatic ocular motility disorders, a flow-chart for detecting the basic pathomechanism was worked out. Normal muscle diameter is observed in entrapment of the perimuscular tissues or in a recent palsy, whereas increased muscle thickness suggests hematoma or incarceration, and thinned muscles an atrophy. A lack of change in muscle diameter when the patient looks in the direction in which motility is restricted is characteristic of atrophy or palsy, whereas an increase in muscle diameter is a sign of incarceration if a fracture has also been detected by echography; if not, muscle hematoma can be diagnosed.

Hematoma↗
PubMed1986

Small choroidal melanoma with diffuse orbital involvement detected and differentiated with standardized echography--with special reference to the reliability of sonography in predicting scleral tumoral infiltration.

Report on a 73-year-old man with a proptosis of the left eye. Standardized A- and B-scan sonography revealed a large orbital tumor with low reflectivity and regular internal structure. Furthermore, a small choroidal melanoma with a typical excavation at its base was detected by echography. It could be demonstrated by reduction of the sound energy that the sclera adjacent to this tumor was intact, suggesting a melanoma migration along small scleral vessel-channels into the orbit. All these findings were proved by histology. The echographical criteria of choroidal melanomas without and with scleral infiltration will be presented and their reliability will be discussed.

Aged↗
PubMed1984

[Results of A-scan echography in diseases of the orbit].

Standard A-scan sonography was performed in 191 patients with orbital mass lesions. In 36 cases tissue differentiation was not possible; in a further 11 patients the orbital lesion was not detected by ultrasonography. However, it provided an accurate histological diagnosis preoperatively in 87% of the remaining 144 patients.

Humans↗
PubMed1984

[Echographic diagnosis in diseases of the efferent tear ducts].

We report the results of our echographic examinations of 250 patients with diseases of the lacrimal drainage system. First, normal A- and B-scan pictures are presented. Then the echographic criteria of malformations (persistence of the valve of Hasner, dacryocystocele), dacryocystitis and its complications (fistula, membrane-formation, stenosis) are discussed. The possibility of pre- and postoperative controls with echography is stressed. Tumors of the lacrimal sac can also easily be detected.

Cysts↗
PubMed1984

[Surgeon and eye doctor Caspar Stromayr and the ophthalmological illustrations in his "Practica copiosa" (1559)].

In 1559 Caspar Stromayr wrote a richly illustrated book about hernias and their treatment. The manuscript also includes 3 chapters of a book on ophthalmological diseases which, however, was never published. In addition, it contains 6 separate watercolor illustrations of eye diseases, though without any explanatory texts. The authors attempt to interpret these first colored pictures of eye diseases.

Germany↗
PubMed1982

[100 years of ophthalmology].

100 years ago ophthalmology was already an own special sector of medicine. In 1850, when Hermann von Helmholtz invented the ophthalmoscope, the beginning of modern ophthalmology was established. The "Ophthalmologische Gesellschaft" was founded in 1863. From thereon major advances in all divisions of ophthalmology were achieved. Some outstanding personalities and highlights are mentioned.

Germany↗
PubMed1982

[Reflectivity and sound attenuation in choroidal melanomas (author's transl)].

Choroidal melanomas are echographically characterized by medium reflectivity and strong sound attenuation. The statistical analysis of these criteria in 110 histologically proven melanomas showed significant different values according to the type of melanoma. The results of correlation between histological and echographical findings are discussed.

Choroid Neoplasms↗