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Query: UMLS:C0025202 (melanoma)
 69,561 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A white woman with unilateral nevus of Ota presented with visual loss and an intraocular mass resembling a choroidal melanoma. Indirect ophthalmoscopy, fluorescein angiography, ultrasonography, and radioactive phosphorus uptake corroborated the clinical impression and surgery was advised. Following enucleation, the specimen was examined with light microscopy, which revealed a mixed cell type malignant melanoma of the choroid. Electron microscopy disclosed the presence of premelanosomes in the episclera, indicating that the episcleral pigmentation is a result of melanocytic evolution. This paper represents the tenth report in the literature of choroidal melanoma occurring in a patient with nevus of Ota, and the first electron-microscopic study of an eye with this association of lesions.
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PMID:Malignant melanoma of choroid in a case of nevus of Ota. 43 36

A sixty year old white woman with a history of Peutz-Jeghers syndrome with nail involvement, presented with a marked hyperpigmentation of the terminal phalanx and nail of the right index finger. Two preceding biopsy specimens from the fingertip were interpreted as junction nevus. After amputation of the fingertip and terminal phalanx, the final diagnosis was subungual malignant melanoma. Further amputation of the entire finger and portion of the corresponding metacarpal bone was done as a successful follow-up procedure.
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PMID:Subungual malignant melanoma. 45 29

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

In a 12-month period 26 eyes were enucleated after an ultrasonographic diagnosis was made of malignant melanoma of the choroid. Histologic features of the tumors were reviewed. The ultrasonographic diagnosis was correct in 100% (26/26) of enucleated eyes. Spontaneous vascular movement (SVM) was identified by standardized A-scan echography in 69% (18/26) of the tumors. Contact B-scan ultrasonography demonstrated choroidal excavation in 65% (17/26) of the melanomas. During the 12-month study period, choroidal excavation was also demonstrated in cases of metastatic choroidal tumors, hemangiomas of the choroid, and long-standing choroidal nevi. The standardized A-scan finding of SVM is a compelling sign in the diagnosis of choroidal malignant melanoma. In contrast, the B-scan finding of choroidal excavation is a less useful sign since it may also be seen in various other ocular lesions.
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PMID:Ultrasonographic features of choroidal malignant melanomas. 46 71

A pigmented lesion developed in three patients in the center of the scar following excision and grafting to remove melanoma. Histologically, the lesions showed hyperplasia of melanocytes resembling junction nevus or lentigo maligna. Some site-specific factor seems to be responsible for this change.
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PMID:Pigmented lesion following complete removal of melanoma. 48 87

Three cases of malignant melanoma resembling spindle and epithelioid cell nevus histologically are presented. Lesions having histologic features of spindle and epithelioid cell nevus (Spitz nevus or juvenile melanoma) at or after puberty should be regarded with caution, particularly when they are heavily melanized. Such lesions are in a histologic "gray zone" and may be malignant.
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PMID:Melanoma resembling spindle and epithelioid cell nevus. 53 85

The technique and results of 30 iridocyclectomies performed by the senior author are reviewed. Although the total number of cases is small for statistical purposes, its main value is that all the operations were performed by one surgeon, which means a uniform criteria for the indications, surgical technique, management of complications, immediate and postoperative decisions, follow-up control, and direct discussion of the histopathology with the pathologist. Three techniques were used: (1) routine excision only of uveal tissue in 15 cases, (2) cyclectomy, ie, plus excision of deep scleral wall in four cases, and (3) block excisions of cornea, sclera, affected iris, and ciliary body followed by a reconstructive penetrating graft in 11 cases. Twenty-one cases were melanocytoma; one, metastatic tumor; one, nevus; two, cysts; and three, foreign body granulomas. Prognostic features such as cell type, largest diameter above 10 mm, tumor thickness, tumor at edge, iris or ciliary body origin, location, and preoperative glaucoma are discussed, and some practical conclusions are advanced. The follow-up control for 21 melanoma cases in the series is five to ten years or more in 11 cases and up to four years in ten cases. The visual results are also analyzed.
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PMID:Iridocyclectomy technique and results. 53 91

A case of juvenile melanoma which appeared to be completely intradermal was studied by optical and electron microscopy. The histological dopa reaction was negative and melanin granules could not be detected with Fontana-Masson stain, but detailed electron microscopic examination revealed melanosomes very similar to those found in intradermal nevus cells. The tumor was therefore thought to be composed exclusively of melanogenic nevus cells, and participation of schwannian nevoblasts could be excluded. This view would support the concept of the unitary origin of such nevus cells.
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PMID:Juvenile melanoma--a case report and histogenetic investigation. 58 42

Pigmented lesions of the vagina are very rare. A benign blue nevus of the vagina in a 73-year-old woman, diagnosed clinically as malignant melanoma, is presented. Although 15 cases of blue nevi of the uterine cervix have been reported, this is the first case of blue nevus located exclusively in the vagina.
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PMID:Benign blue nevus of the vagina. 58 75

A clinical follow-up and histopathological reexamination of 26 cases originally diagnosed as malignant melanoma in children under 14 years of age registered in the Swedish Cancer Registry during 1959-1971 has been undertaken. Only one met current criteria of a malignant melanoma. This tumour occurred in a giant naevus in a 3-year-old girl, who died with widespread metastatic melanoma within a year. The other cases were reclassified as melanocytoma of Spitz, cellular blue naevus, compound naevus and neurofibroma. The results confirm that malignant melanoma is a rare tumour in prepubertal children. The risk for histophatological overdiagnosis is much higher in children (95%), than in adults (4%).
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PMID:Malignant melanoma of the skin in children registered in the Swedish cancer registry during 1959-1971. 60 95


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