BMJ Case Reports 2013; doi:10.1136/bcr-2013-200111

Primary signet ring cell carcinoma of the lung: a rare subtype

  1. Christopher F Koch Jr4
  1. 1Internal Medicine Section of Pulmonary and Critical Care, Georgia Regents University, Augusta, Georgia, USA
  2. 2Internal Medicine Section of Pulmonary and Critical Care, VA Specialty Care, Augusta, Georgia, USA
  3. 3Department of Internal Medicine, Georgia Regents University, Augusta, Georgia, USA
  4. 4Medical College of Georgia, Augusta, Georgia, USA
  1. Correspondence to Mr Christopher Koch, ckoch2250{at}


Signet ring cell carcinoma (SRCC) is a subtype of adenocarcinoma. It can arise in different organs including stomach, colon, bladder, prostate and breast. The vast majority of SRCC found in the pulmonary system is metastatic. Primary disease to the lungs is rare. The main feature of this type of malignancy is mucin-producing cells. It has been reported that out of 3500 cases of pulmonary adenocarcinoma, five cases had features of SRCC.

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