Huge renal cyst with parietal renal cell carcinoma, osseous metaplasia and a papillary adenoma: a case report with unique clinicopathological features and literature review

Pulmonary adenocarcinoma with osseous metaplasia: a rare occurrence possibly associated with early stage?

Adenocarcinoma is the most common type of malignant pulmonary tumor, but osseous metaplasia of this tumor is extremely rare. To date, only 21 cases have been reported in the literature worldwide. Here, we report a case of primary pulmonary adenocarcinoma with benign osseous stromal metaplasia in a 60-year-old woman and discuss the pathogenesis of intratumoral ossification and review the relevant literature. We found that pulmonary adenocarcinoma with osseous metaplasia may be more likely to occur in early tumor stages.

A Case of Juxtaglomerular Cell Tumor With Novel Histologic Features

Juxtaglomerular cell tumors constitute a very small group among the renal neoplasms. Most secrete renin, causing hypertension and hypokalemia due to secondary hyperaldosteronism. They have characteristic pathological features. For the accurate evaluation, diagnosis has to be confirmed by immunohistochemical staining for renin or electron microscopic demonstration of renin protogranules. This report presents a case of renal juxtaglomerular cell tumor in a 63-year-old man with previously unreported histological findings in addition to classic morphology.