Proliferating Trichilemmal Tumor of the Knee Mimicking Prepatellar Bursitis on Ultrasonogram: A Case Report

Proliferating trichilemmal tumor is a rare benign tumor of skin appendage. It is usually solitary, more common in women after the fourth decade of life, and almost exclusively confined to the scalp and back of the neck. We report herein an unusual case of proliferating trchilemmal tumor which occurred on the knee.

Double Primary Cancer of the Gallbladder and Cystic Duct: A Case Report

Primary carcinoma of the gallbladder is an uncommon and aggressive malignancy. Furthermore, double primary cancer of the gallbladder and cystic duct is extremely rare and few such cases have been reported. So, we report here on the case of double primary cancer of the gallbladder and cystic duct, which was pathologically confirmed after an operation, and we discuss the US, CT and ERCP findings.