Tumors of the caruncle: A clinicopathologic correlation
ABSTRACT To determine the types and incidence of caruncular lesions and to investigate the correlation between clinical and histologic diagnosis.
Retrospective, observational case series.
Records of patients with a lesion of the caruncle that was excised and submitted to our ocular pathology department between January 1979 and May 2005 were reviewed. Lesions were classified by histologic type and correlated with patient age, gender, and preoperative clinical diagnosis.
A total of 195 consecutive caruncular lesions from 191 patients were identified. Twenty-four different types of lesions were identified; the most common were nevi (n = 92, 47%) and papillomas (n = 29, 15%). One keratoacanthoma was identified. One hundred eighty-three lesions (93.8%) were benign, six (3.1%) were premalignant, and five (2.6%) were malignant. Preoperative clinical diagnosis corresponded to postexcision histologic diagnosis in 73 cases (37.4%). Suspected malignancy was a common reason for excision (61 cases, 31.3%), but malignancy was confirmed in only three (4.9%) of 61 cases. Two of the five malignant lesions were clinically thought to be benign.
We hereby report the first caruncular keratoacanthoma. The rarity and variety of caruncular lesions make clinical diagnosis difficult. Malignancy is clinically overestimated, and some malignant lesions can take a benign aspect, justifying close photographic follow-up of all lesions. Because caruncular malignant melanoma is associated with poor prognosis, pigmented lesions should be monitored carefully. In the absence of clear criteria for malignancy, any change in color, size, or vascularization of a caruncular lesion should hasten excision.
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.Antennas, Propagation and EM Theory, 2003. Proceedings. 2003 6th International SYmposium on; 01/2003
- The British journal of ophthalmology 01/2008; 91(12):1718-9. DOI:10.1136/bjo.2007.117317 · 2.81 Impact Factor
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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.Eye (London, England) 11/2008; 23(5):1004-18. DOI:10.1038/eye.2008.316 · 1.90 Impact Factor