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Related Concept Videos

Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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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...
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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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Bone Formation by Endochondral Ossification01:24

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Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
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Compact Bone01:27

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
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Bone Formation by Intramembranous Ossification01:29

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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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Osteoid Osteoma Mimicking Inflammatory Synovitis.

Nikhil Seniaray1, Anuj Jain1

  • 1Vijaya Diagnostic Centre, Himayathnagar, Hyderabad, Telangana, India.

Indian Journal of Nuclear Medicine : IJNM : the Official Journal of the Society of Nuclear Medicine, India
|July 7, 2017
PubMed
Summary
This summary is machine-generated.

Osteoid osteomas are common benign bone tumors. Intra-articular osteoid osteomas can mimic other conditions, delaying diagnosis and treatment, as shown in this case series.

Keywords:
99mTc-MDP bone scanF-18 Fluoride PET-CTMRIintra-articularosteoid osteoma

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Area of Science:

  • Orthopedics
  • Radiology
  • Oncology

Background:

  • Osteoid osteoma is a common benign bone tumor, typically affecting young adults.
  • Its presentation is characteristic in common locations but can be misleading in unusual intra-articular sites.

Observation:

  • This case series details three patients with intra-articular osteoid osteoma.
  • The intra-articular location posed diagnostic challenges, mimicking other joint pathologies.

Findings:

  • Correlative imaging was crucial for accurate diagnosis of intra-articular osteoid osteoma.
  • Delayed diagnosis in these cases highlights the importance of considering osteoid osteoma in unusual locations.

Implications:

  • Accurate and timely diagnosis of intra-articular osteoid osteoma is essential for appropriate management.
  • Recognizing this entity in atypical locations can prevent prolonged diagnostic delays and improve patient outcomes.