Journal of Kerman University of Medical Sciences

Primary Signet Ring Adenocarcinoma of the Lung in a 34-Year-Old Nonsmoking Man

Document Type : Case Report

Authors

Akramossadat Hosseini 1
Zeinab Vosough 2

1 Cancer Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran & Clinical Research Development Center, Shahid Beheshti Hospital, Babol University of Medical Sciences, Babol, Iran

2 Pathology department, Babol University of Medical Sciences, Babol, Iran

https://doi.org/10.22062/jkmu.2021.91835
Abstract
Background: Pulmonary carcinoma is a burdensome malignancy that has the third rank in prevalence among other cancers and is the leading cause of death in patients with cancer diagnosis. Signet ring morphology is encountered commonly in many sites like stomach, bladder, gallbladder and etc. Primary signet ring adenocarcinoma of the lung is a rare phenomenon, including about 5% of all surgically removed pulmonary adenocarcinoma. It should be distinguished from metastatic tumors.
Case presentation: a 34-year-old nonsmoker man who referred to Babol Rohani Hospital with a one-month history of nonproductive cough. Biopsy with CT scan guidance from ground-glass opacities of the left lung revealed neoplastic cells with signet ring appearance infiltrating lung parenchyma. Immunohistochemistry (IHC) study revealed positivity of neoplastic cells for AE1/AE3, CK7, TTF-1 and negativity for CK20, CDX2, and CD68.
Conclusion: The signet ring feature of pulmonary adenocarcinoma has shorter survival, therefore, it is associated with poor prognosis. Immunohistochemistry (IHC) techniques provide the ability to originate tumor cells in these conditions.

Keywords

Signet ring
Adenocarcinoma
Lung cancer
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Journal of Kerman University of Medical Sciences
Volume 28, Issue 6
November and December 2021
Pages 616-620

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