The Role of CD56 in distinction of PTC from other thyroid neoplasms

Emadian Saravi, Omid; Torabizadeh, Zhila; Amirkhani, Saeed

Journal of Emergency Health Care

Formerly known as: International Journal of Medical Investigation

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Volume 4, Issue 4 (december 2015) J Emerg Health Care 2015, 4(4): 385-390 | Back to browse issues page

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Emadian Saravi O, Torabizadeh Z, Amirkhani S. The Role of CD56 in distinction of PTC from other thyroid neoplasms. J Emerg Health Care 2015; 4 (4) :385-390
URL: http://intjmi.com/article-1-198-en.html

The Role of CD56 in distinction of PTC from other thyroid neoplasms

Omid Emadian Saravi

, Zhila Torabizadeh ^*

, Saeed Amirkhani

Associate Professor of pathology, Gut and liver Research Center, Pathology Department of Imam Khomeini hospital, Sari Faculty of Medicine, Mazandaran University of medical Sciences.

Abstract: (9857 Views)

Objective: Thyroid nodules which are common in population consist of mostly benign nodules and less malignant neoplasms. Differentiating malignant nodules from each other arises a drastic problem in making a correct diagnosis Thus,this study was done to investigate the role of CD56 and its specificity and sensitivity in different types of thyroid neoplasms especially papillary carcinoma.

Methods: 73 paraffin embedded-blocks of thyroid massses (nodules) were studied for CD56 immunohistologically from Imam Khomeini hospital ,Sari,Mazandaran.The 4-scaled semiquantitative method (0-3) was applied to estimate CD56 expression in tumor cells less than 10% (0) or negative staining, 10-33% (1), 33-66% (2), more than 66% (3).

Results: In this study 24.7% were male and 75.3% were female. 13.7% ,68.5 % and 17.8% of patients were less than 20, between 20- 50,and over 50 years old respectively.Simultaneously 50(68.5%) patients had both right and left lobes nodules.12(16.4%) ,6(8.2%)and 1(1.4%) patients had nodules in right and left lobes and isthmus respectively.Consequently, 4 (5.5%)patients showed left and right lobes ,and ithsmus nodules simultaneousely. There was no statistically significant difference between the sexes and ages and also anatomical regions in patients with and without PTC. 30 out of the 73 patients had papillary carcinoma(PTC) which 4 out of them expressed CD56 while 37 out of 43(86%) patients who had non-PTC showed positive results for CD56.Sensivity and specificity of negative result of CD56,positive predictive value(PPV) and negative predictive value(NPV) in the diagnosis of papillary carcinoma were 86.6%,86%,81.2% and 86.3% respectively.

Conclusion: Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and overall accuracy (OA) of negative result of CD56 in the diagnosis of PTC were 86.6%, 86.04%, 81.25%, 90.24% and 86.3% respectively. This study showed that CD56 was a valuable sensitive and specific marker in differentiating PTC from other thyroid tumors.

Keywords: Papillary thyroid carcinoma, Other thyroid masses, CD56

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Type of Study: Research | Subject: General

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