Related Experiment Video
Updated: Jun 27, 2026
09:20
Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis
Published on: December 18, 2019
Osteopoikilosis and chondrocalcinosis
R Guzmán1, J Félix, Restrepo-Suárez
1Clínica Fray Bartolomé de la Casas (R.G.), Universidad Nacional de Colombia (J.F.R.S., M.P.C., A.I.G.), Hospital el Guavio (G.R.), Instituto Nacional de Salud (R.M.), Santa Fe de Bogotá, Colombia.
Summary
Osteopoikilosis, a rare disorder of calcium phosphate deposition in cartilage, can mimic other conditions. This study reports a unique case of osteopoikilosis co-occurring with chondrocalcinosis in a young female patient.
Area of Science:
- Orthopedics
- Radiology
- Rheumatology
Background:
- Osteopoikilosis involves abnormal calcium phosphate deposition in articular cartilage, often an incidental finding.
- Chondrocalcinosis is characterized by calcium pyrophosphate deposition in articular cartilage.
- Both conditions can be asymptomatic, posing diagnostic challenges.
Purpose of the Study:
- To describe radiographic features differentiating osteopoikilosis from similar conditions.
- To report the first known case of osteopoikilosis co-occurring with chondrocalcinosis in a single patient.
Main Methods:
- Radiographic analysis to identify distinguishing features of osteopoikilosis.
- Case report of a young female patient presenting with both conditions.
Main Results:
- Specific radiographic findings were identified to differentiate osteopoikilosis.
- A young female patient was diagnosed with both osteopoikilosis and chondrocalcinosis.
Conclusions:
- Osteopoikilosis can be distinguished from other conditions through specific radiographic markers.
- The simultaneous occurrence of osteopoikilosis and chondrocalcinosis is reported for the first time, highlighting potential associations.
Related Concept Videos
01:29Bone 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...
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...
01:24Bone Formation by Endochondral Ossification
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...
01:27Growth of Cartilage and Bone Tissue
Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
01:05Proteoglycans
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
01:02What is the Skeletal System?
Overview
01:31Osteoclasts 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...