Basal Cell Carcinoma of the Caruncle
Department of Ophthalmology, Montreal General Hospital, McGill University, Montreal, Quebec, Canada.Ophthalmic Plastic and Reconstructive Surgery (Impact Factor: 0.88). 07/2006; 22(4):313-4. DOI: 10.1097/01.iop.0000226921.48952.92
An 82-year-old white man presented with a 2- to 3-month history of a lesion in his left medial canthal region. Surgical excision of the lesion was performed, and histopathology showed a nodular basal cell carcinoma of the caruncle. Because of incomplete surgical margins after the initial excision, a second excision was performed, followed by a course of adjuvant radiotherapy. No tumor recurrence was detected in the caruncle after 6 months of follow-up. ©2006 The American Society of Opthalmic Plastic and Reconstructive Surgery, Inc.
Conference Paper: Analysis of rectangle dielectric antenna in time-domain[Show abstract] [Hide abstract]
ABSTRACT: This paper analyzes propagation characteristic of electromagnetic (EM) wave in rectangle dielectric waveguide by effective dielectric constant (EDC) method. The relationship between phase velocity and dielectric rod size is shown. This paper also discusses the feasibility of rectangle dielectric antenna used in time-domain and presents how to choose antenna's parameter and size. At the end of this paper some simulations are made by finite difference time domain (FD-TD) method. The influence of antenna's size, length and taper on the propagation and radiation characteristic is analyzed. The result shows that rectangle dielectric antenna is likely to be used in time-domain.
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ABSTRACT: Lesions of the caruncle are uncommon. On account of the histological composition of the caruncle, which includes, in addition to conjunctiva, hair follicles, sebaceous glands, sweat glands, and accessory lacrimal tissue, the caruncle may develop lesions that may be similar to those found in the skin, conjunctiva, or lacrimal gland. Clinical preoperative diagnosis is very difficult and reached only in about half of the cases. The vast majority of lesions of the caruncle are benign, mainly nevi. Reported malignant lesions are very rare but can be potentially fatal. Although malignancy is clinically overestimated, any suspected malignant lesion should be excised and examined histopathologically by an experienced pathologist. This study presents the clinical and histological data of 42 consecutive caruncular lesions processed at our laboratory and reviews previously reported cases of caruncular lesions.
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ABSTRACT: Although basal cell carcinoma (BCC) is the most common eyelid neoplasm, BCC that originates from the lacrimal caruncle is extremely rare. To the best of our knowledge, only seven cases have been reported and here we report the first documented primary caruncular BCC in an Oriental patient. A 73-year-old Chinese man presented with a telangiectatic, multilobulated, pigmented tumor that measured 5×5 mm, which had arisen from the lacrimal caruncle of the left eye 3 months previously. The patient underwent tumor excision, and histopathological examination revealed BCC. He received adjuvant chemotherapy with intra-arterial methotrexate (30 mg/m(2)). A nodular pigmented BCC recurred in the bulbar conjunctiva close to the original tumor 3 months later, and he underwent a second excision. Bleomycin (8.5 mg/m(2) monthly) was added to the chemotherapy regimen, which was changed to fluorouracil (300 mg/m(2) monthly) 2 months later. The tumor did not recur during follow-up of 22 months. Malignant tumors of the caruncle are infrequent. BCC should be considered in the differential diagnosis of a pigmented caruncular lesion.