Mucoepidermoid carcinoma presenting as an orbital apex syndrome.
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Biomedical subjects
Publications and source records attributed to S M Corin.
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Two imaging modalities, computed tomography (CT) and dacryocystography (DCG), were combined to demonstrate the relationships between the lacrimal system and the surrounding soft-tissue structures. In selected cases, such as those involving severe facial trauma, midfacial tumours, significant sinus disease, or previous lacrimal, nasal or sinus surgery, this imaging technique may be useful in better evaluating the anatomy of the lacrimal system and planning a surgical approach.
Ptosis may develop after cataract surgery because of a dehiscence of the levator aponeurosis. A series of patients undergoing entropion repair was examined in order to determine the mechanism of entropion and the correlation with cataract surgery. It is suggested that involutional senile entropion may develop related to cataract surgery, on the same basis as ptosis, due to disinsertion of the capsulopalpebral fascia. It is suggested that the cataract surgeon should examine the patient closely for preoperative entropion to prevent or anticipate the development of frank entropion after the cataract surgery.
A mathematical formula that allows for the computation of the true angle between the upper and lower canaliculi using dacryocystograms is described. It was used to determine the true canalicular angle in 33 patients. The mean calculated angle at the 1.0 mm distance was 57.2 degrees +/- 13.0 degrees, and at the 0.5 mm distance was 65.2 degrees +/- 16.2 degrees. The true calculated angle was highly correlated with the angle measured in the Waters view. There was no statistically significant correlation between the right and left sides in the same patient. There was no statistically significant difference between the canalicular angle in males and females, and there was no correlation between canalicular angle and patient's age. A clinical application of this model is discussed.
We report a patient with a rare form of laceration through the lower punctum, vertical canaliculus, ampulla, and lower eyelid. A modification of a standard canalicular laceration repair involving the use of silk stent in the canalicular system is described.
A new atraumatic technique for identifying the medial cut end of a surgically lacerated canaliculus is described. It offers the advantage of allowing the surgeon to pass a stent through the canaliculus only, without surgically manipulating the lacrimal sac or nasolacrimal duct or damaging the ipsilateral canaliculus.
We describe using a scaffold of free periosteum as a posterior lamella replacement in the reconstruction of large defects involving the lower lid. Although the tarsoconjunctival flap is the treatment of choice in lower lid defects, the technique we describe is especially useful in cases in which it is best not to cover the eye for an extended period, and in cases involving defects extending beyond those of the lower lid.
We propose a simple technique for modifying a Jones bypass tube to prevent extrusion. It has been used in eight patients followed for 3 months to 3 years, without evidence of extrusion.