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Related Concept Videos

Bone Structure01:55

Bone Structure

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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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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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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The hyoid bone is a small U-shaped bone located in the upper neck at the level of the inferior mandible, with its tips pointing posteriorly. It does not directly articulate with any other bone in the body. The hyoid acts as the attachment site for the tongue, the larynx, and the pharynx. It is held in position by a series of small muscles attached from above or below. These muscles help to move the hyoid up/down or forward/back in coordination with movements of the tongue, larynx, and pharynx...
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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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Related Experiment Video

Updated: Feb 13, 2026

Evaluation of Commercial-Off-The-Shelf Wrist Wearables to Estimate Stress on Students
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Evaluation of Commercial-Off-The-Shelf Wrist Wearables to Estimate Stress on Students

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Persistent wrist monarthritis: down to the bone.

Jonathan Toh Leong Cheah1, Theodore R Fields1

  • 1Department of Medicine, Hospital for Special Surgery, New York, New York, USA.

BMJ Case Reports
|March 1, 2018
PubMed
Summary
This summary is machine-generated.

Juxta-articular osteoid osteomas in the wrist are rare. This case highlights a delayed diagnosis of an osteoid osteoma in the lunate bone, emphasizing its consideration in prolonged wrist monarthritis.

Keywords:
orthopaedicsradiologyrheumatology

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Rheumatology

Background:

  • Osteoid osteomas are benign bone tumors typically affecting long bones.
  • Juxta-articular osteoid osteomas, especially in the small bones of the wrist, are uncommon.
  • Differential diagnosis for wrist pain can be extensive, including inflammatory and infectious etiologies.

Observation:

  • A 30-year-old male presented with a 3-year history of left wrist pain, swelling, and decreased range of motion.
  • Initial investigations considered inflammatory and infectious causes, leading to diagnostic delay.
  • Multiple imaging modalities and repeat examinations were necessary for diagnosis.

Findings:

  • An osteoid osteoma was diagnosed in the lunate bone of the left wrist.
  • Surgical excision of the osteoid osteoma resulted in complete resolution of symptoms.
  • Histopathological confirmation of osteoid osteoma was obtained post-excision.

Implications:

  • Juxta-articular osteoid osteoma should be included in the differential diagnosis for prolonged, isolated wrist monarthritis.
  • Advanced imaging techniques are crucial for diagnosing rare osteoid osteoma presentations.
  • Timely diagnosis and surgical management can lead to excellent patient outcomes.