Non-Small Cell Carcinoma of the Lung With Osteoclast-Like Giant Cells.

Carcinomas of the lung with benign osteoclast-like giant cells are rare. A literature search showed only 8 previously reported examples. These tumors resemble a giant cell tumor of bone.

DNA cytophotometric and histological analysis of N-butyl-N-(4-hydroxybutyl)nitrosamine-induced precancerous lesions of the bladder urothelium.

Purpose: The morphology of experimentally induced urinary bladder precancerous lesions has been differentially interpreted in the literature. Here, we aimed to describe the development of precancerous lesions of the urothelium histologically and by DNA cytophotometric analysis.

Methods: We induced precancerous lesions of the urothelium in 60 Wistar rats with 0.

Immunohistochemical evaluation of a sarcomatoid hepatocellular carcinoma with osteoclastlike giant cells.

Background: Malignant liver tumors with osteoclast-like giant cells are rare. A literature search showed 17 previously reported cases that included the following: (1) 8 undifferentiated hepatocellular carcinomas, (2) 5 sarcomatous tumors with osteoclast-like giant cells associated with intrahepatic cholangiocarcinoma or liver cystadenocarcinoma, and (3) 4 sarcomatoid tumors with osteoclast-like giant cells associated with areas of a conventional hepatocellular carcinoma.

Case Presentation: A 68-year-old man presented with a tumor of the right lobe of the liver on ultrasonography and computed tomography.