The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

Medically reviewed by Jay N. Yepuri, MDMedically reviewed by Jay N. Yepuri, MD Polyps in the colon and rectum (together called colorectal polyps) are common in people over age 50. They are usually ...

We describe the case of a female patient with a leiomyosarcoma of the lower extremity who developed atypical disseminated metastases in the liver and bone, and a pendunculated polypoid metastasis in ...