Related Experiment Video
Updated: May 25, 2026

08:07
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
Osteoid osteoma with an atypical nidus: A case report
Khodamorad Jamshidi1, Reza Shafipour, Iman Qomashi
1Associate Professor of Orthopaedic Surgery, Tehran University of Medical Sciences, Shafa Yahyaian Hospital, Baharestan Sq., Tehran, Iran.
Abstract:
Osteoid osteoma is a benign tumor that can be seen in both cortical or cancellous bone. Radiographic appearance is usually diagnostic. It consists of a small nidus usually less than 1.5cm and a surrounding bony sclerosis. We present one case of osteoid osteoma with an unusual (nearly completely calcified) nidus.
Related Concept Videos
Osteoclasts in Bone Remodeling
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
Bone Cells and Tissue
Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
Osteoblasts and Osteocytes
The osteoblast is the bone cell responsible for forming new bone tissue. It is found in the growing portions of bone, including the periosteum and...
Osteoblasts and Osteocytes
The osteoblast is the bone cell responsible for forming new bone tissue. It is found in the growing portions of bone, including the periosteum and...
