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Related Concept Videos

Bone Disorders01:29

Bone Disorders

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.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Spongy Bone01:09

Spongy Bone

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).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
Osteoclasts in Bone Remodeling01:31

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...
Cushing Syndrome II: Pathophysiology01:19

Cushing Syndrome II: Pathophysiology

Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...

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Related Experiment Video

Updated: Jun 23, 2026

A Rat Tibial Growth Plate Injury Model to Characterize Repair Mechanisms and Evaluate Growth Plate Regeneration Strategies
06:53

A Rat Tibial Growth Plate Injury Model to Characterize Repair Mechanisms and Evaluate Growth Plate Regeneration Strategies

Published on: July 4, 2017

Juvenile Paget's disease.

C K Indumathi1, Chitra Dinakar, Rakesh Roshan

  • 1Department of Pediatrics, St Johns Medical College Hospital, Bangalore, India. satgir@sify.com

Indian Pediatrics
|April 23, 2009
PubMed
Summary

Juvenile Paget's disease (JPD) is a rare genetic disorder causing rapid bone turnover in children. This case highlights a 15-year-old patient with JPD, emphasizing the need for early diagnosis to prevent disease progression.

Area of Science:

  • Genetics
  • Pediatrics
  • Endocrinology

Background:

  • Juvenile Paget's disease (JPD) is a rare, inherited skeletal disorder.
  • It is characterized by significantly accelerated bone remodeling, presenting in early childhood.
  • Early diagnosis is crucial for managing JPD and preventing long-term complications.

Observation:

  • A case report of a 15-year-old child with typical features of JPD is presented.
  • The patient remained undiagnosed until adolescence, despite exhibiting characteristic symptoms.
  • This case underscores the diagnostic challenges associated with rare pediatric bone diseases.

Findings:

  • The case demonstrates a delayed diagnosis of JPD in a pediatric patient.
  • Typical clinical and potentially radiological features of JPD were observed.

Related Experiment Videos

Last Updated: Jun 23, 2026

A Rat Tibial Growth Plate Injury Model to Characterize Repair Mechanisms and Evaluate Growth Plate Regeneration Strategies
06:53

A Rat Tibial Growth Plate Injury Model to Characterize Repair Mechanisms and Evaluate Growth Plate Regeneration Strategies

Published on: July 4, 2017

  • The rarity of JPD in Indian medical literature is noted.
  • Implications:

    • This case emphasizes the importance of considering rare genetic disorders like JPD in the differential diagnosis of unexplained skeletal abnormalities in children.
    • Timely diagnosis of JPD is essential to initiate appropriate management and mitigate disease progression.
    • Reporting this case contributes to the limited literature on JPD, particularly within the Indian subcontinent, raising awareness among clinicians.