Results 241 to 250 of about 2,304,945 (294)

Malignant Transformation in Craniopharyngiomas

Neurosurgery, 2014
Craniopharyngiomas are successfully managed with surgery and/or adjuvant chemoradiotherapy but have been documented to undergo malignant transformation (MT), albeit very rarely, with only 23 reported cases. The exact cause and pathogenesis of this MT are unknown, although the literature has suggested a possible correlation with radiotherapy.To review ...
Agbolahan A, Sofela, Samantha, Hettige, Olimpia, Curran, Sanj, Bassi   +3 more
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Malignant Transformation of Angiomyolipoma

Journal of Urology, 1992
Angiomyolipomas are well recognized but uncommon tumors that can involve the kidney. To our knowledge a well documented case of malignant change of angiomyolipoma has never been reported. We report a case of renal angiomyolipoma and leiomyosarcoma with a clearly identified transition of benign to malignant elements seen in the resected tissue.
B A, Lowe, J, Brewer, D C, Houghton, E, Jacobson, T, Pitre   +4 more
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Malignant transformation of craniopharyngioma

Journal of Clinical Neuroscience, 1999
Craniopharyngioma is a well recognised intracranial tumour; malignant transformation has been rarely described. In that case, malignant change occurred following irradiation for local recurrence and information is not provided on the biological behaviour of the tumour or the response to management.
K, Virik, J, Turner, R, Garrick, J P, Sheehy   +3 more
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The Cell Surface and Malignant Transformation

Annual Review of Medicine, 1974
A malignant cell has lost many restrictions to which normal cells are subjected. For example, cell division is no longer tightly regulated by cell-cell contact or specific serum factors, serum-mediated hormonal feedback loops are broken, and cell recog­ nition of neighboring cells no longer leads to maintenance of cell position.
Pollack, R. E., Hough, P. V.
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Transformation of malignant growth

Klinische Wochenschrift, 1971
In the present paper, the distinction of carcinomatous and sarcomatous growth will be discussed at the cellular level.
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Telomerase and Malignant Transformation

2002
Recent progress in our understanding of the role of telomeres and telomerase in cell proliferation, malignant transformation, and genomic stability has opened new possibilities for cancer diagnosis, detection, and treatment. Novel approaches based on this knowledge are being investigated in different laboratories and are likely to have a significant ...
Jiamei, Yu, Louis, Dubeau
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Malignant Transformation of Ectopic Pancreas

Digestive Diseases and Sciences, 2018
Malignant transformation of ectopic pancreas tissue is a diagnostic challenge as clinical symptoms and radiographic features of these tumors are non-specific. Given the rarity of these lesions, it is usually neither suspected nor included in the diagnostic workup of different tumors.
Irina M, Cazacu, Adriana Alexandra, Luzuriaga Chavez, Graciela M, Nogueras Gonzalez, Adrian, Saftoiu, Manoop S, Bhutani   +4 more
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Malignant Transformation of Endometriosis

2014
The association between endometriosis and epithelial ovarian cancer has been supported by years of epidemiologic research. Approximately 1.0 % of women with endometriosis may undergo malignant transformation. The malignant transformation is believed to progress in a stepwise fashion through an intermediary endometriotic lesion, atypical endometriosis ...
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Malignant transformation in a thymic cyst

The American Journal of Surgical Pathology, 1984
Thymic cysts have not been previously reported to show malignant transformation. This is the first documented case of well-differentiated papillary squamous cell carcinoma arising in a preexisting thymic cyst. The tumor was treated by surgical excision with no evidence of metastasis 6 1/2 years later.
A S, Leong, J H, Brown
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Malignant Transformation of Gartner Cyst

International Journal of Gynecological Cancer, 2009
Vaginal cysts are common lesions that include Gartner cysts, which develop from the wolffian duct remnants in the vaginal wall. Malignant transformation of Gartner cysts is exceedingly rare. Our case was diagnosed upon evaluation of vaginal bleeding in a 67-year-old woman. Histologic examination showed a clear cell carcinoma.
Anne-Sophie, Bats, Ulrike, Metzger, Marie-Aude, Le Frere-Belda, Marie, Brisa, Fabrice, Lecuru   +4 more
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