Related Experiment Video
Updated: Feb 15, 2026
04:49
Automated Counterflow Centrifugal System for Small-Scale Cell Processing
Published on: December 12, 2019
9.8K
Pseudomalignant osteoblastoma of the odontoid process
Pedro Fernandes1, Joaquim Soares do Brito2, Adília Costa3
1Orthopaedics Department, Centro Hospitalar Lisboa Norte, University Hospital of Santa Maria, Avenida Professor Egas Moniz, 1649-035, Lisbon, Portugal.
Summary
Pseudomalignant osteoblastomas are rare spinal tumors. This case shows a benign outcome for a pseudomalignant osteoblastoma in a child
Area of Science:
- Orthopedic Surgery
- Pediatric Oncology
- Skeletal Radiology
Background:
- Osteoblastomas are rare bone tumors, with pseudomalignant histology being an infrequent subtype.
- The odontoid process is an exceptionally rare site for osteoblastomas.
- Enneking stage 2 osteoblastomas typically require conservative management, but pseudomalignant features complicate treatment decisions.
Observation:
- A 6-year-old male presented with a type III odontoid fracture, which healed.
- Follow-up CT revealed an expansile lesion at the odontoid process.
- Biopsy confirmed osteoblastoma with pseudomalignant histological features.
Findings:
- The patient underwent intralesional excision for the odontoid osteoblastoma.
- Despite pseudomalignant histological features, no further treatment was administered.
- A 10-year follow-up showed no recurrence, pain, or loss of cervical spine mobility.
Implications:
- Histological pseudomalignant features alone may not predict aggressive behavior in odontoid osteoblastomas.
- Conservative management can be successful for select stage 2 odontoid osteoblastomas with pseudomalignant histology.
- This case highlights the importance of long-term follow-up for spinal tumors.
More Related Videos
09:32Management of the Uncinate Process in No-Touch Laparoscopic Pancreaticoduodenectomy
Published on: May 5, 2023
1.5K
07:06Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes
Published on: January 27, 2017
9.2K
Related Concept Videos
01:20Parallel Processing
780
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
780
01:30Information Processing Approach
610
The information-processing theory of cognitive development centers on fundamental mental processes, including attention, memory, and problem-solving skills. Researchers in this field examine how cognitive abilities, such as working memory, evolve and influence children's overall development. Studies indicate that children with stronger working memory tend to excel in reading comprehension, math, and problem-solving compared to peers with less efficient memory skills. Low working memory is...
610
01:29Processes of Self-Presentation
257
Effective self-presentation is a central component of social interaction and identity construction. It relies on the dynamic processes of defining the situation and engaging in self-disclosure. These mechanisms help individuals navigate social context expectations and manage how others perceive them, fostering mutual understanding and relationship development.Defining the SituationSocial situations are shaped by collectively understood frames—a set of widely understood rules or...
257
01:21Isothermal Processes
5.1K
A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
5.1K
01:20Work Done in an Adiabatic Process
4.3K
Consider the adiabatic compression of an ideal gas in the cylinder of an automobile diesel engine. The gasoline vapor is injected into the cylinder of an automobile engine when the piston is in its expanded position. The temperature, pressure, and volume of the resulting gas-air mixture are 20 °C, 1.00 x 105 N/m2, and 240 cm3 , respectively. The mixture is then compressed adiabatically to a volume of 40 cm3. Note that, in the actual operation of an automobile engine, the compression is not...
4.3K
01:12Precipitation Processes
6.3K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
6.3K