Correct!
4. Plasmacytoma

The histopathological findings are consistent with the diagnosis of plasmacytoma. No features of amyloidosis were noted, and no capillaritis was seen to suggest pulmonary vasculitis. Flow cytometry did not disclose the presence of lymphoma / leukemia. The histopathological pattern was not consistent with the cellular interstitial inflammatory infiltration typically seen with lymphocytic interstitial pneumonia.

Diagnosis: Plasmacytoma in the lung

References

  1. Ooi GC, Chim JC, Au WY, Khong PL. Radiologic manifestations of primary solitary extramedullary and multiple solitary plasmacytomas. AJR Am J Roentgenol. 2006;186 (3):821-7. [CrossRef] [PubMed]
  2. Ujiie H, Okada D, Nakajima Y, Yoshino N, Akiyama H. A case of primary solitary pulmonary plasmacytoma. Ann Thorac Cardiovasc Surg. 2012;18(3):239-42. [CrossRef] [PubMed] 
  3. Shah BK, Shrestha A. Pulmonary plasmacytoma. J Thorac Oncol. 2012; 7(5):923. [CrossRef] [PubMed] 
  4. Niitsu N, Kohri M, Hayama M, Nakamine H, Nakamura N, Bessho M, Higashihara M. Primary pulmonary plasmacytoma involving bilateral lungs and marked hypergammaglobulinemia: differentiation from extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue. Leuk Res. 2005; 29(11):1361-4. [CrossRef] [PubMed] 
  5. Kaneko Y, Satoh H, Haraguchi N, Imagawa S, Sekizawa K. Radiologic findings in primary pulmonary plasmacytoma. J Thorac Imaging. 2005; 20(1):53-4. [CrossRef] [PubMed] 

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