Excisional biopsies of skin lesions and gastrointestinal polyps are very common. Diagnosis is typically by colonoscopy with tissue biopsies. Tumor samples may be submitted as core needle biopsies or surgical specimen. Ultrasound imaging can be obtained via transrectal ultrasound and is used during prostate biopsies. Diagnosis is typically by cystoscopy with tissue biopsies. Tissue analysis comes from either surgical biopsies or post mortem autopsies. It can also be used to detect and analyze tumors on hepatic and kidney biopsies. Identification of adult worms is possible from tissue samples collected during subcutaneous biopsies. Deep tissue biopsies are required to definitively diagnose dermatomyositis. Biopsies of patients given the treatment show reductions in liver damage and cirrhosis. Using the robotic system, gynecologists can perform hysterectomies, myomectomies, and lymph node biopsies. If the lesion changes in appearance repeat biopsies are especially indicated. Cyclin levels can easily be determined through immunohistological analysis of tumor biopsies. The diagnosis is usually confirmed by biopsies on colonoscopy. The intestinal mucosa heals quickly from such biopsies.