Merkel cell carcinoma with cytokeratin 20-negative and thyroid transcription factor-1-positive immunostaining admixed with squamous cell carcinoma

2011 ◽  
Vol 64 (1) ◽  
pp. 77-79 ◽  
Author(s):  
Shinichi Koba ◽  
Takuya Inoue ◽  
Takeshi Okawa ◽  
Akiko Tara ◽  
Naomi Yada ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Transcription Factor ◽  
Cell Carcinoma ◽  
Merkel Cell Carcinoma ◽  
Cytokeratin 20 ◽  
Merkel Cell ◽  
Thyroid Transcription Factor 1 ◽  
Thyroid Transcription Factor ◽  
Positive Immunostaining ◽  
Transcription Factor 1

Immunostaining for Thyroid Transcription Factor 1 and Cytokeratin 20 Aids the Distinction of Small Cell Carcinoma From Merkel Cell Carcinoma, But Not Pulmonary From Extrapulmonary Small Cell Carcinomas

2001 ◽  
Vol 125 (2) ◽  
pp. 228-231 ◽  
Author(s):  
W. Cheuk ◽  
M. Y. Kwan ◽  
Saul Suster ◽  
John K. C. Chan
Keyword(s):  
Transcription Factor ◽  
Cell Carcinoma ◽  
Small Cell Carcinoma ◽  
Merkel Cell Carcinoma ◽  
Small Cell ◽  
Cytokeratin 20 ◽  
Merkel Cell ◽  
Thyroid Transcription Factor 1 ◽  
Thyroid Transcription Factor ◽  
Transcription Factor 1

Abstract Objective.—To study the expression of thyroid transcription factor 1 (TTF-1) and cytokeratin 20 (CK20) in pulmonary small cell carcinomas, extrapulmonary small cell carcinomas, and Merkel cell carcinomas, and thereby determine whether these markers are helpful in distinguishing these 3 groups of small cell neuroendocrine carcinomas. Materials and Methods.—Immunostaining for TTF-1 and CK20 was performed in 102 cases of small cell carcinoma (pulmonary, 52; extrapulmonary, 50) and 23 cases of Merkel cell carcinoma. The results for the 3 groups were compared. Results.—Thyroid transcription factor 1 was expressed in 82.7% of pulmonary small cell carcinomas, 42.0% of extrapulmonary small cell carcinomas (range, 33.3–53.3% for the various sites), and 0% of Merkel cell carcinomas. Cytokeratin 20 staining was consistently negative in pulmonary small cell carcinomas, and positive in 4.0% of extrapulmonary small cell carcinomas and 100% of Merkel cell carcinomas. Conclusions.—Immunostaining for TTF-1, especially when combined with immunostaining for CK20, can aid in the distinction between Merkel cell carcinoma and small cell carcinoma (both pulmonary and extrapulmonary). However, in individual cases, these markers cannot be used to distinguish between pulmonary and extrapulmonary small cell carcinomas due to the extensive overlap in immunophenotypes.

Small Cell Carcinoma of the Renal Pelvis and Ureter: Clinicopathologic and Immunohistochemical Features

2011 ◽  
Vol 135 (12) ◽  
pp. 1565-1569 ◽  
Author(s):  
Ross J Miller ◽  
Sten Holmäng ◽  
Sonny L Johansson ◽  
Subodh M Lele
Keyword(s):  
Transcription Factor ◽  
Urothelial Carcinoma ◽  
Cell Carcinoma ◽  
Renal Pelvis ◽  
Small Cell ◽  
Cytokeratin 20 ◽  
Cytokeratin 7 ◽  
Thyroid Transcription Factor 1 ◽  
Thyroid Transcription Factor ◽  
Transcription Factor 1

Context.—Small cell carcinoma (SCC) of the renal pelvis and/or ureter is very rare, with only case reports published in the literature. Objective.—To describe the clinicopathologic and immunohistochemical findings in the largest series to date. Design.—A review of a regional cancer registry identified 10 cases diagnosed as SCC from 930 patients with renal pelvic and/or ureteral cancer from 1971 to 1998. The original slides, demographics, treatment, and clinical outcome were reviewed. Representative sections were immunostained for AE1/AE3, cytokeratin 7, cytokeratin 20, CD56, synaptophysin, chromogranin, and thyroid transcription factor 1. Results.—Of the 10 cases, 5 were pure SCC, 2 were mixed (SCC and urothelial carcinoma), 2 were reclassified as poorly differentiated squamous carcinoma, and 1 was reclassified as urothelial carcinoma. The patients with SCC had an age range of 50 to 80 years (median, 72 years) with a female to male ratio of 2.5∶1. All patients had non–organ confined disease. Five of 7 patients died of disease; 4 of those 5 had been clinically followed (median survival, 23 months) and 1 was diagnosed at autopsy. The SCC cases revealed positive staining of the SCC component as follows: AE1/AE3 (7 of 7), CD56 (7 of 7), synaptophysin (6 of 7), thyroid transcription factor 1 (5 of 7), chromogranin (4 of 7), and cytokeratin 7 (1 of 7). None were positive for cytokeratin 20 (0 of 7). Conclusions.—SCC of the renal pelvis/ureter is seen in a predominately female population in Sweden, is clinically aggressive, and has poor survival when presenting at an advanced stage in patients only treated by surgery. An immunostain panel serves as a useful adjunct in classifying these tumors.

Expressions of Thyroid Transcription Factor-1, Napsin A, p40, p63, CK5/6 and Desmocollin-3 in Non-Small Cell Lung Cancer, as Revealed by Imprint Cytology Using a Malinol-Based Cell-Transfer Technique

2015 ◽  
Vol 59 (6) ◽  
pp. 457-464 ◽  
Author(s):  
Toshiaki Kawai ◽  
Susumu Tominaga ◽  
Sadayuki Hiroi ◽  
Koji Kameda ◽  
Sho Ogata ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Cell Carcinoma ◽  
Squamous Cell ◽  
Small Cell ◽  
Imprint Cytology ◽  
Small Cell Lung ◽  
Thyroid Transcription Factor 1 ◽  
Thyroid Transcription Factor ◽  
Napsin A ◽  
Transcription Factor 1

Background: The introduction of new therapies has made it important to differentiate between adenocarcinoma and squamous cell carcinoma. To allow the use of various immunocytochemical stains on limited materials, we tried transferring cells from a given smear to multiple slides. Using touch-preparation samples of 215 surgically resected non-small cell lung carcinomas of confirmed histologic classification (adenocarcinoma,n = 101; squamous cell carcinoma,n = 114), we performed immunocytochemistry for thyroid transcription factor-1, napsin A, p40, p63, CK5/6 and desmocollin-3, and compared cytologic staining results with the corresponding resection. Methods: We examined: (a) the expressions of the above 6 antibodies on cells transferred from touch imprints of resected specimens, the extent of staining being considered positive if more than 5% of the area was stained, and (b) the sensitivity, specificity, positive predictive value and negative predictive value for each antibody. Results: The histologic corresponding rate with Papanicolaou staining was only 73%. Regarding the differentiation of adenocarcinoma from squamous cell carcinoma, the sensitivity and specificity for napsin A in adenocarcinoma were 80 and 97%, respectively, while those for p40 in squamous cell carcinoma were 84 and 98%, respectively. Conclusion: The immunocytochemical expressions of napsin A and p40 in imprint cytology seem to be of great utility for the accurate histological differentiation of lung cancers.

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