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Biomedical subjects

M Gdal-On

Publications and source records attributed to M Gdal-On.

29 records · Page 2Linked to original sources

Long-term follow-up of children with retinoblastoma.

Twenty-one pediatric retinoblastoma (RB) patients treated between 1976 and 1994 were evaluated for late treatment-related complications. Median age at diagnosis was 24 months; median age at follow-up was 12 years; median follow-up time was 12 years. Of the 21 patients, 14 had unilateral RB and 7 had bilateral RB. Thirteen patients had received external radiotherapy and 8 children were treated by chemotherapy. Twenty-one patients had undergone enucleation. Radiation-induced cataracts were found in 3 patients, radiation retinopathy in 1, enucleation and postradiotherapy contracted socket in 1, very low visual acuity postradiotherapy in 3, severe hypotelorism in 2, growth hormone deficiency in 2, neurocognitive disorders in 6, and orbital deformation due to radiation bone atrophy was moderate-severe in 12 patients. Azoospermia was found in 1 patient treated by cyclophosphamide and vincristine. The most frequent sequela in this group of RB-cured children were postradiotherapy orbital deformation due to bone atrophy and neurocognitive disabilities. Late radiation effects must be avoided by using modern, innovative, and more sophisticated radiotherapeutic techniques. Late treatment-related complications justify the long-term follow-up of childhood RB survivors.

Adolescent↗

Traumatic carotid aneurysm secondary to cavernous sinus penetration by wood: CT features.

Transorbital penetration of the cranial cavity by a small wooden object can pass unnoticed, while producing severe, life-threatening consequences. The occurrence of a traumatic intracranial aneurysm secondary to a wooden foreign body has not been reported previously in the English literature, to our knowledge. Familiarity with the CT features of this complication is crucial since the CT findings may be the first to suggest penetration of the cavernous sinus by wood, as well as the possibility of a traumatic carotid aneurysm. The CT features of this rare complication are discussed and the pertinent literature is reviewed.

Carotid Artery Diseases↗

Orbital metastasis of renal cell carcinoma masquerading as Amaurosis fugax.

Renal cell carcinoma (RCC) is the most common malignancy involving the kidney. Only rarely does it metastasize to the eye and orbit, sometimes mimicking other lesions. A 70-year-old woman was referred from neurology because of a right orbital lesion, six months after the start of a neurological investigation because of amaurosis fugax. Six months earlier she had complained of transient visual disturbances in her right eye. After excluding cardiovascular abnormalities and coagulopathies as the source of her complaints, she was diagnosed as having a right senile ptosis. A computed tomography scan, done to complete the workout, detected a right orbital mass. The patient was referred to the oculoplastic unit. A biopsy and then a lateral orbitotomy were performed. Histopathological examination proved it to be a metastatic renal cell carcinoma, seven years after the primary tumor had been diagnosed and treated by nephrectomy. The characteristics of metastatic renal cell carcinoma are discussed, in view of the rarity of metastasis to the eye and, in particular, to the orbit, and its tendency to masquerade as other lesions or symptoms. In this case it presented as amaurosis fugax before other signs appeared.

Aged↗

Tc-99m labeled red blood cells scintigraphy: a diagnostic method for orbital cavernous hemangioma.

PURPOSE: To evaluate Tc-99m labeled red blood cells scintigraphy (Tc-99m RBC scintigraphy) as a diagnostic method for orbital cavernous hemangioma. PATIENTS AND METHODS: Retrospective analysis of the medical records of all patients who were diagnosed as suffering from orbital cavernous hemangioma over the last 16 years. RESULTS: Medical records of 12 patients with orbital cavernous hemangioma were identified. In all twelve patients, the tentative diagnosis of orbital cavernous hemangioma was made by CT scan. In all of them, the diagnosis was established by Tc-99m RBC scintigraphy, demonstrating a typical picture of "perfusion blood- pool mismatch" (This is normal radionuclide angiography, followed by a variable radionuclide uptake during the early blood-pool study and an intensive radionuclide uptake during the delayed blood-pool study). The tumor was surgically removed in all 12 patients. This diagnostic method was found to be reliable as no single case was recorded in which the preoperative diagnosis was not confirmed pathologically after surgical removal of the tumor. CONCLUSIONS: Tc-99m RBC scintigraphy is a reliable method for diagnosing orbital cavernous hemangioma. It should be included in our arsenal of diagnostic techniques, particularly for cases which are otherwise difficult to diagnose.

Adult↗

Microphthalmos with orbital cyst: a clinicopathological report.

The clinical and histopathological findings in a case of microphthalmos with orbital cyst is described. The clinical interesting feature of this case was the bilateral coloboma which represented interference in the development of the eye at different stages of embryonic life.

Child, Preschool↗