Amiodarone-related pulmonary mass and unique membranous glomerulonephritis in a patient with valvular heart disease: Diagnostic pitfall and new findings

Tokuhiro Kimura, Shigeru Kuramochi, Takaharu Katayama, Tsutomu Yoshikawa, Taketo Yamada, Yoshihiko Ueda, Yasunori Okada

Research output: Contribution to journalArticle

4 Citations (Scopus)


Amiodarone is an anti-arrhythmic drug for life-threatening tachycardia, but various adverse effects have been reported. Reported herein is an autopsy case of valvular heart disease, in a patient who developed a lung mass (1.5 cm in diameter) and proteinuria (2.76 g/day) after treatment with amiodarone for a long time. The lung mass was highly suspected to be lung cancer on CT and positron emission tomography, but histologically the lesion was composed of lymphoplasmacytic infiltrates in alveolar walls and intra-alveolar accumulation of foamy macrophages containing characteristic myelinoid bodies, indicating that it was an amiodarone-related lesion. In addition, the lung tissue had unevenly distributed hemosiderin deposition, and abnormally tortuous capillaries were seen in the mass and in heavily hemosiderotic lung portions outside the mass. In the kidneys, glomeruli had membrane spikes, prominent swelling of podocytes and subepithelial deposits, which were sometimes large and hump-like. Autoimmune diseases, viral hepatitis, malignant neoplasms or other diseases with a known relationship to membranous glomerulonephritis were not found. The present case highlights the possibility that differential diagnosis between an amiodarone-related pulmonary lesion and a neoplasm can be very difficult radiologically, and suggests that membranous glomerulonephritis might be another possible complication of amiodarone treatment.

Original languageEnglish
Pages (from-to)657-663
Number of pages7
JournalPathology International
Issue number10
Publication statusPublished - 2008 Oct



  • Amiodarone
  • Glomerulonephritis
  • Lung
  • Positron emission tomography
  • Proteinuria

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this