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Results for “Carcinoma, Papillary”

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At least 19 recordsLinked to original sources
PubMed1978

Ultrastructure of an anaplastic giant-cell carcinoma found 8 years after operation on a papillary carcinoma of the thyroid.

Light and electron microscopic studies have been made on an anaplastic giant-cell tumor that developed in a woman 8 years after an operation on the thyroid for papillary carcinoma. Many giant cells were observed in the anaplastic tumor tissue, but no follicles. Numerous tightly-packed mitochondria and abundant ribosomes were present, but there were no desmosomes. The basement membrane was not distinct.

Aged↗
PubMed1976

External irradiation in treatment of papillary carcinoma of the thyroid.

A retrospective review of thirty patients with papillary carcinoma of the thyroid with metastatic or direct extension of their disease was undertaken. These thirty patients were treated by a standard surgical procedure and postoperative high dose orthoirradiation with an average twenty-one year follow-up period. Results of this treatment are compared with those of eighty similar patients treated by surgery alone. The primary treatment of papillary carcinoma of the thyroid remains surgical but with a consideration that irradiation may be of benefit in certain instances.

Adult↗
PubMed1977

Papillary tumors of the peritoneum in women: mesothelioma or papillary carcinoma.

It has been urged recently that the surface tumors of the ovary be classified as mesotheliomas because both of these neoplasms have a common ancestry. It was suggested also that the rare extragonadal peritoneal tumor of a microscopic morphology similar to that of the ovarian tumor be considered as a mesothelioma. In the present report, objections to this classification are offered. Fifteen cases of diffuse and/or localized peritoneal tumors interpreted as papillary carcinoma arising from extraovarian tissue of Müllerian potentiality are described, and distinctions from mesothelioma are pointed out. Reasons for opposing the grouping of ovarian carcinoma or extragonadal papillary carcinoma of the peritoneum with mesothelioma include the need for categorizing the latter separately in order to monitor its association with asbestos exposure and the possibility that biological differences between these tumors may lead to the development of different modes of therapy.

Adult↗
PubMed1994

Molecular characterization of RET/PTC3; a novel rearranged version of the RETproto-oncogene in a human thyroid papillary carcinoma.

The RET proto-oncogene encodes a transmembrane receptor of the tyrosine kinase family and has frequently been found activated in human thyroid carcinomas of the papillary subtype. In most cases the activation consisted of the fusion of its tyrosine-kinase domain with the 5'-terminal region of a gene designated H4 or D10S170. We have named the resulting H4/RET chimeric oncogene RET/PTC. Another activated form of the RET oncogene has subsequently been found in a thyroid carcinoma and is now referred to as RET/PTC2. Here we report the identification and cloning of a novel rearranged version of the RET oncogene in a human thyroid papillary carcinoma. In this case the tyrosine-kinase domain of RET was fused to a sequence 790 bp long belonging to a new gene that we have named RFG (RET Fused Gene). This novel chimeric oncogene has been designated RET/PTC3. In order to have more insights into the function of RFG we have completely cloned and sequenced its cDNA. RFG predicted amino-acid sequence does not have any significant homology to any already known genes and is ubiquitously expressed in human and mouse tissues. Finally we provide evidence indicating that the rearrangement leading to the generation of RET/PTC3 occurred in vivo in the original tumor DNA.

Amino Acid Sequence↗
PubMed1979

Local application of THIO-TEPA in the prevention of recurrent papillary carcinoma of the bladder.

Prophylactic total THIO-TEPA treatment was employed in 44 cases over a period of five years, following radical surgery (including reoperations) for recurrent vesical papillomatosis or carcinoma, and numerous subsequent transurethral coagulations or resections owing to multiple recurrences. Three patients have been now free from recurrences for five years, 13 patients for four years, 11 patients for three years and 9 patients for two years. Eight patients proved unresponsive, the recurrence rate having remained unaffected. No toxic effects requiring any special measures were encountered.

Administration, Topical↗
PubMed1979

The optically clear nucleus. A reliable sign of papillary carcinoma of the thyroid?

The clear ("Orphan Annie Eye") nucleus has been accepted as one of the important microscopic features of papillary carcinoma of the thyroid. This study undertook an examination of 100 consecutive thyroid lesions exclusive of papillary, mixed, and follicular carcinomas for the presence of these nuclei. Only two lesions (2%), a follicular adenoma and diffuse hyperplasia, had such nuclear morphology but as focal changes. Thirty-seven cases of papillary, mixed, and follicular carcinoma were also studied. Clear or empty nuclei were present in 83% of papillary carcinomas. One carcinoma of follicular type had clear nuclei in a diffuse distribution. "Pseudoclear" nuclei were noted in a variety of situations ranging from normal thyroids to diffuse hyperplasia, where they were present in 65% of cases. We conclude that clear nuclei when present as a diffuse changes in a thyroid tumor are a reliable sign of papillary carcinoma but are not pathognomonic. If the character of the clear nuclei is questionable, other histologic features of papillary carcinoma should be looked for, such as papillae with overlapping nuclei, psammoma bodies and multicocality. It was also fould that frozen sections and imprints do not demonstrate the nuclei; they appear only in fixed tissues.

Adenocarcinoma↗