摘要:

Frozen sections are used to determine the extent of eyelid tumors. The contraction of skin that occurs between the time of eyelid skin excision and frozen section preparation may result in the false impression that the tumor is incompletely excised. This requires the unnecessary removal of additional normal tissue. We have demonstrated in animal and human studies that the surface application of cyanoacrylate adhesive to skin significantly reduces the degree of skin contraction. Furthermore, the cyanoacrylate coating provides added rigidity that prevents the tissue margins from rolling inward. This facilitates the production of full-thickness, vertically oriented sections that are perpendicular to the skin surface. The cyanoacrylate coating prevents folding of the sections at the time of microtome cutting. The adhesive does not interfere with the staining, interpretation of the histopathology. or subsequent reconstruction.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

A 64-year-old woman developed a slowly enlarging yellow mass in the left upper eyelid that was removed by wedge resection. Histopathologic examination revealed the tumor to be a sebaceous adenocarcinoma of the glands of Zeis. The clinical features, histopathology, management, and prognosis for Zeis gland carcinomas are discussed, with emphasis upon their differences from the more common Meibomian gland carcinomas.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

The contractile state of the sympathetically innervated superior and inferior tarsal muscles, also known as Mueller's muscles, was defined in 10 young adults by stimulating and then paralyzing these muscles pharmacologically in a randomized, double-masked study, using one eye for drug and the other for control. The drugs used topically were phcn-ylephrine hydrochloride 2.5 and 10% for muscle stimulation, and guanethidine 5% and thymoxamine hydrochloride 0.5% for muscle inhibition. A model is described for accurately examining and recording changes in the vertical palpebral fissure simultaneously bilaterally using magnified images from two high-resolution, high-sensitivity video cameras. The superior tarsal muscle averaged 50% of its total possible contraction when it was in its tonic state, and the inferior tarsal muscle averaged 67%. The drug instillations defined the mean maximum total excursion of the superior tarsal muscle as 3.0 mm, with 1.5 mm of upward displacement and 1.5 mm of downward displacement from its tonic position. The inferior tarsal muscle had a mean maximum total excursion of 0.3 mm, with 0.1 mm downward displacement and 0.2 mm upward displacement from its tonic position.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

We conducted a cadaver study of the levator palpebrae superioris muscle to examine several areas of interest that have been reported in the current medical literature. A very strong intermuscular fascia exists between the levator and superior rectus muscles; it is unlikely that a superior rectus bridle suture could pull them apart during cataract surgery. The superior transverse ligament of Whitnall functions to check the posterior movement of the levator; it provides longitudinal support to the resected levator, but does not act as a vertical fulcrum.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Three middle-aged male patients had painless superior temporal orbital tumor causing globe displacement. Roentgenograms revealed superior temporal orbital tumor with lysis of bone. Surgical excision and curettagc completely removed the lesions, which extended from the frontal bone to the periorbita and the dura. Histologically, these were cystic lesions containing a granulomatous reaction to blood breakdown products, including cholesterol clefts, hemosiderin, giant cells, and hematodin, consistent with chronic hematic cyst. A fibrous pseudocapsule formed the cyst wall.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Free autogenous “pearl fat” grafts of 5–6 mm in diameter arc used as a method of soft tissue augmentation for the eyelid. This method is useful in restoring eyelid contour defects, separating the eyelid lamella to lower the upper eyelid crease, and augmenting eyelids in anophthalmos. Graft survival is variable and pretreatment of fat with insulin is used in an attempt to prolong fat survival. The rationale, indications, and surgical procedure are discussed.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Adipose tissue is a material successfully utilized in the past for soft tissue augmentation. A comparison of insulin-treated free autogenous fat “pearl” grafts to insulin-treated injected fat “micrografts” was made in a rabbit animal model. Gross and microscopic examinations of free autogenous fat grafts were performed at 2. 6, and 12. weeks. With present techniques, results suggest that greater long-term soft tissue augmentation and graft survival is obtained with insulin-treated free fat “pearl” grafts.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

This article discusses laser ablation of blepharopigmentation in four stages: first, experimentally, where pigment vaporization is readily achieved with the argon blue-green laser: second, in the rabbit animal model, where eyelid blepharopigmentation markings are ablated with the laser; third, in human subjects, where the argon blue-green laser is effective in the ablation of implanted eyelid pigment: and fourth, in a case report, where, in a patient with improper pigment placement in the eyelid, the laser is used to safely and effectively ablate the undesired pigment markings. This article describes in detail the new technique of laser ablation of blepharopigmentation. Potential complications associated with the technique are discussed.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Blepharopigmentation or permanent eyeliner is a popular cosmetic procedure currently performed by a variety of methods. All methods attempt to implant ferrous oxide pigment into the dermis. We performed histopathologic studies on a series of three eyelid specimens, including two by a previously undescribed multi-needle pigment delivery system. Light microscopy revealed the epidermis to be pigment-free and the dermis to contain pigment in clumps. Transmission electron microscopy (EM) demonstrated that the pigment was largely in macrophages. Energy-dispersive x-ray micro-analysis showed that in addition to iron and talc, titanium particles were also present. These findings suggest that the pigment is tolerated by the eyelid despite the fact that current pigments are contaminated.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Epibulbar osseous choristomas are rare congenital collections of mature compact bone most often located in the supero-temporal fornix. Most cases are not recognized preoperatively, as the lesion is usually felt to represent a dermatolipoma or epibulbar dermoid. Although most previous reports have described a loose attachment to the surrounding orbital structures, we report two cases in which intimate scierai incorporation was present. In one case, preoperative computerized tomography and echography allowed the diagnosis and probable scierai involvement to be considered preoperatively, and surgery was deferred. The embryogenesis of these lesions is uncertain, although they seem to correlate with the scleral ossicles seen in avian anatomy, and may represent abnormal activation of embryonic pluripotential mesenchymal cells.

ISSN:0740-9303    

出版商:OVID    

年代:1988

数据来源: OVID