Benign Clear-Cell Tumor (“Sugar” Tumor) of the Lung: A Case Report and Review of the Literature

Abstract

Benign clear-cell tumor of the lung is a rare, distinctive, primary neoplasm with unique histologic and electron microscopic features which may resemble metastatic renal-cell carcinoma. This tumor typically presents as an asymptomatic, peripheral, sharply rounded mass in the lung. Clinical recognition can prevent an unnecessary search for a primary malignant source.