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Query: UMLS:C0027960 (mole)
 21,279 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

5 1/2 years after excision of pigmented malignant melanoma which apparently arose in a nevus of the paralimbal bulbar conjunctiva, this 42-year-old male presented himself with a nonpigmented mass of the lid margin which also proved to be a malignant melanoma. "Acquired melanosis sine pigmento" was considered as a site of origin, but histopathologically there is more evidence that this melanoma arose in a non-pigmented compound nevus.
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PMID:[Multiple conjunctival malignant melanomas (author's transl)]. 45 34

This is a description of a male patient, now 8-years-old, with the syndrome described by Schimmelpennig-Feuerstein and Mims. Characteristic for this clinical picture, which is classified as a phacomatosis, are a striated and sponge-like naevus sebaceus, disorders of the central nervous system taking the form of debility and epileptic attacks, and multiple anomalies of the eyes, such as microphthalmus, coloboma of the eyelids and optic nerve with ablatio falciformis, as well as dermoids and teratomas of the conjunctiva.
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PMID:[Ocular findings in syndroma of Schimmelpenning-Feuerstein and Mims (author's transl)]. 80 41

The clinical and histological features of three cases of conjunctival balloon cell nevi are described. This peculiar form of nevus is very rare in the conjunctiva. The findings are compared with the descriptions in the literature of dermal balloon cell nevi. They demonstrate, that the conjunctival and dermal tumours are of idential histological structure. The proliferations of the conjunctival epithelium often found in conjunctival nevi do not modify the balloon cell nevi. These can not be diagnosed clinically. The problems of the pathogenesis of the balloon cell nevi are discussed.
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PMID:[Balloon cell nevi of the conjunctiva (author's transl)]. 121 1

The reactivity of the monoclonal antibody HMB 45 was evaluated in melanocytic tumors of the conjunctiva. Among these are 10 acquired melanoses, 19 nevi and 34 melanomas. Results were compared with the presence of the S 100 antigen. Especially the intraepithelial and junctional components of primarily benign lesions were stained with HMB 45. Within malignant melanoma this antibody reacts with melanocytes in the epithelial, junctional and subepithelial areas. The polyclonal antibody S 100 stains all melanocytes in pigmented lesions of the conjunctiva. Intraepithelial or subepithelial malignant infiltrating tumor cells show very intense staining with HMB 45. HMB 45 has therefore high specificity for stimulated melanocytes, but it does not distinguish benign and malignant proliferating melanocytic cells.
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PMID:[Distribution of melanoma-associated antigens (HMB 45 and S 100) in benign and malignant melanocytic tumors of the conjunctiva]. 175 71

A clinically benign appearing nevus was surgically excised from the conjunctiva of a 13-year-old girl because of complaints that it had recently enlarged. Histologically, the melanocytic lesion displayed considerable cytologic atypia and showed signs that were consistent with malignant transformation. Because of the rarity of conjunctival melanomas in children, the case was reviewed by several experienced pathologists and dermatopathologists whose diagnoses ranged from benign nevus with atypia to malignant melanoma. When the biologic potential of certain melanocytic lesions cannot be accurately predicted histologically, treatment and follow up must be individualized. Physicians must weigh the perceived risks and disadvantages of treating a histologically indeterminate tumor against the consequences of "under" treatment if the lesion is, in fact, biologically malignant.
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PMID:Borderline melanocytic tumor of the conjunctiva: diagnostic and therapeutic considerations. 195 62

Conjunctival pigmented lesions, including ten compound nevi, three subepithelial nevi, two acquired melanoses, and six melanomas, were examined histologically and immunohistochemically to determine the specificity of mouse monoclonal HMB-45 antibody for these lesions. Eleven of 13 nevi, two of two acquired melanoses, and six of six melanomas stained with this antibody. Conjunctival melanomas showed intense and diffuse cytoplasmic staining; compound nevi and subepithelial nevi showed less intense but diffuse reaction. There was strong staining in melanocytic cells at the junction of the epithelium and substantia propria in compound nevi and acquired melanoses. Unlike skin nevi, conjunctival nevi show HMB-45 reactivity in their stromal components. Immunoreactivity to HMB-45 does not distinguish benign from atypical or malignant melanocytic lesions of the conjunctiva.
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PMID:HMB-45 antibody reactivity in pigmented lesions of the conjunctiva. 218 15

Eighty-one cases of conjunctival melanoma treated between 1960 and 1988 were studied to determine factors that might affect outcome in patients with such lesions. The therapeutic procedures performed were local excision (16), local excision followed by brachytherapy with Sr-90/Y-90 (32), local excision followed by cryotherapy with liquid nitrogen (16), brachytherapy with Sr-90/Y-90 (12), local excision followed by external beam irradiation (3), and local excision followed by brachytherapy and cryotherapy (2). The median follow-up period was 5.5 years (longest 26, shortest 1 year). Sixty two patients (76.5%) showed a complete regression of the melanoma, 19 (23.5%) developed recurrences, and 15 (18.5%) died from metastases. The melanomas had developed with almost equal frequency from a pre-existing naevus (25.9%), from primary acquired melanosis (25.9%), and 'de novo' (30.9%). Small tumours had a higher chance of regressing (80.6%) than larger ones (68.6%). The cumulative survival rate was 76% after five years and 60% after 10 years from any causes of death and 87.6% after five years and 76.3% after 10 years from deaths caused by metastases. Most deaths from metastases occurred within 5 years. At 88.5%, the cumulative survival rate of patients with small tumours (less than one quadrant of the bulbar conjunctiva and less than 2 mm thickness) was significantly higher than that of patients with larger tumours (more than one quadrant of the bulbar conjunctiva and/or more than 2 mm thickness) with 65% after eight years. Local excision followed by beta ray irradiation (Sr-90/Y-90) or cryotherapy can be recommended as the treatment of choice. Nevertheless the behaviour of conjunctival melanomas remains unpredictable in individual cases.
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PMID:Therapeutic outcome of patients suffering from malignant melanomas of the conjunctiva. 228 86

Human papillomaviruses are receiving attention for their role in the pathogenesis of cancer, especially cancer of the anogenital tract. Although strains of human papillomavirus are associated with benign lesions of the conjunctiva, their association with conjunctival dysplastic lesions and carcinomas has remained unclear. We examined a group of neoplastic lesions of the conjunctiva for the presence of DNA sequences for human papillomavirus types 16 and 18, using in vitro gene amplification with the polymerase chain reaction. Tissue specimens of five conjunctival dysplastic lesions and one invasive carcinoma and swab specimens of the mucosa of both corneas of a patient with unilateral corneal dysplasia contained DNA sequences related to human papillomavirus type 16. All dysplastic specimens examined were positive for DNA sequences. Viral DNA was not detected in six control specimens from patients with conjunctival melanoma, papilloma, nevus, or pterygium. We conclude that DNA from human papillomavirus type 16 is present in a substantial percentage of conjunctival premalignant and malignant lesions. It may play a part in the development of conjunctival dysplasia and carcinoma, as it does in cancers of certain other body sites.
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PMID:DNA of human papillomavirus type 16 in dysplastic and malignant lesions of the conjunctiva and cornea. 254 37

The common acquired conjunctival nevus usually undergoes progressive maturation and only exceptionally gives rise to conjunctival melanoma. Pure junctional nevi are rare except in childhood. Histologically, however, a junctional nevus may be indistinguishable from primary acquired melanosis (PAM) with atypia, a condition of middle-aged and elderly individuals that has a tendency to evolve into melanoma. Nevi in adolescents may attract a vigorous lymphocytic response and may cause clinical and histologic confusion with other entities, particularly a regressing nodule of melanoma that occurs predominantly in adults. Rarely, congenital conjunctival nevi are identified, sometimes in patients with adjacent congenital nevi of the eyelid. A variety of unusual nevi, including balloon-cell nevi, Spitz nevi, epithelioid cell nevi, dysplastic nevi, recurrent nevi, episcleral melanosis and the nevus of Ota, blue and cellular blue nevi, melanocytoma, and composite or mixed nevi all may be identified in the conjunctiva. Concepts of histogenesis as well as the clinical, light microscopic, and ultrastructural features of these and other benign pigmentary conditions of the conjunctiva are described.
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PMID:Benign conjunctival melanocytic lesions. Clinicopathologic features. 265 39

We report a case of Spitz nevus of the bulbar conjunctiva in a 15-year-old boy. Clinically, the lesion was juxtalimbic, nodular, red, and 6mm in diameter. Only histologic examination provided the diagnosis. Perusal of the literature revealed seven cases of Spitz nevus of the conjunctiva, but for some of them the histology was incompletely described. We compare the clinical and histologic features in cutaneous and conjunctival nevi and stress the similarity between the two. The histologic criteria which permit differentiation of melanomas and Spitz nevi in conjunctival locations are identified.
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PMID:A case of conjunctival Spitz nevus: review of literature and comparison with cutaneous locations. 266 66


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