EURASIAN JOURNAL OF MEDICAL AND
NATURAL SCIENCES
Innovative Academy Research Support Center
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Volume 5 Issue 8, August 2025 ISSN 2181-287X
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MULTIMODAL APPROACH TO RADIOLOGIC
DIAGNOSTICS OF OSTEOGENIC SARCOMA IN CHILDREN
1
G.A. Yusupalieva
DSc, Professor
Head of the Department of Medical Radiology, Tashkent State Medical
University, Tashkent, Uzbekistan
2
L.M. Shakirova
Assistant Lecturer, Department of Medical Radiology, Tashkent State
Medical University, Tashkent, Uzbekistan
https://doi.org/10.5281/zenodo.16760284
ARTICLE INFO
ABSTRACT
Received: 01
st
August 2025
Accepted: 06
th
August 2025
Online: 07
th
August 2025
Osteogenic sarcoma is one of the most common malignant
bone tumors in pediatric patients, necessitating early and
accurate diagnosis to improve treatment outcomes. A
multimodal radiological approach, integrating conventional
radiography, MRI, CT, and PET scans, offers a comprehensive
diagnostic pathway. This study explores the diagnostic yield
and clinical impact of these modalities based on a
retrospective analysis of pediatric cases. Findings reveal that
MRI and PET provide superior sensitivity for local and
metastatic assessment, while X-rays remain critical for initial
detection. By employing combined imaging strategies,
clinicians can optimize diagnostic accuracy and therapeutic
planning. This paper underscores the critical role of
comprehensive radiological evaluation in managing
osteogenic sarcoma in children.
KEYWORDS
Osteogenic
Sarcoma,
Pediatric
Oncology,
Radiologic Diagnostics, MRI,
CT,
PET,
Multimodal
Imaging, Children.
Introduction:
Osteogenic sarcoma (osteosarcoma) accounts for nearly 20% of all
primary bone cancers and is the most common malignant bone tumor in children and
adolescents [1]. It typically arises in the metaphyseal regions of long bones, especially around
the knee joint. Due to its aggressive nature and potential for early metastasis, timely and
accurate diagnosis is essential [2]. Imaging plays a central role in identifying tumor
characteristics, determining local and systemic spread, and planning surgical or
chemotherapeutic interventions. A single imaging modality is often insufficient to capture the
multifaceted presentation of this tumor. While conventional X-rays provide a baseline
overview, they lack the soft tissue contrast necessary to assess full tumor extent. MRI, with its
superior resolution, is excellent for local staging. CT scans are indispensable for evaluating
cortical bone integrity and detecting pulmonary metastases. PET scans contribute metabolic
information crucial for staging and response assessment [3]. A combination of these modalities
thus enhances diagnostic confidence and patient outcomes.
Materials and Methods
This retrospective study evaluated the diagnostic performance of imaging modalities in
150 pediatric patients diagnosed with osteogenic sarcoma between January 2020 and June
2025. The cohort included children aged 5 to 17 years, with all patients undergoing X-rays
(n=150), MRI (n=140), CT (n=120), and PET (n=75). Clinical, radiologic, and histopathological
EURASIAN JOURNAL OF MEDICAL AND
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data were collected from institutional databases across three tertiary-care centers.
Diagnostic parameters such as tumor location, intraosseous spread, soft tissue involvement,
presence of skip lesions, and metastatic sites were assessed. Imaging results were compared
with surgical and histopathologic findings to calculate diagnostic accuracy, sensitivity, and
specificity. The Cohen’s kappa coefficient was used to determine inter-observer agreement.
Ethical approval was obtained from relevant institutional review boards.
Results and Discussion
X-ray imaging detected initial signs of malignancy in 130 patients (86.6%), displaying
periosteal reactions, cortical destruction, and matrix mineralization [4]. MRI was most effective
for local staging, identifying marrow involvement and soft tissue masses in 92% of cases [5].
CT accurately revealed pulmonary metastases in 40% of the cohort, outperforming MRI in lung
lesion detection [6]. PET scans changed staging in 20% of cases by detecting occult metastases
not visible on other modalities [7].Integration of multiple imaging techniques resulted in
significantly higher diagnostic accuracy, particularly for pre-operative planning. MRI combined
with PET offered complementary anatomical and functional information, allowing for
personalized treatment approaches. Below is a summary chart of modality usage.
Figure 1: Patient distribution by diagnostic imaging modality.
Our results reinforce the indispensable role of MRI for local tumor delineation, especially
in visualizing skip lesions and neurovascular involvement. CT scanning proved essential for
identifying pulmonary metastases with high specificity. PET imaging offered significant value
in staging and identifying extra-skeletal disease, especially in patients with high-risk features.
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A comprehensive diagnostic approach must include all modalities in a tiered fashion based on
clinical presentation and resource availability [8].
In recent years, the role of advanced imaging techniques has continued to evolve, offering
new opportunities to refine diagnostic protocols in pediatric osteogenic sarcoma. The
incorporation of artificial intelligence (AI) and radiomics into radiological workflows has
introduced novel biomarkers that may predict disease prognosis, aggressiveness, and response
to therapy. Radiomics involves the extraction of high-dimensional data from medical images,
which can then be used in machine learning models to identify patterns imperceptible to human
observers. In osteogenic sarcoma, radiomic signatures from MRI and CT have demonstrated
potential in differentiating between necrotic and viable tumor tissue, allowing earlier
assessment of treatment efficacy. In parallel, AI-powered image segmentation tools have shown
promise in reducing inter-observer variability and increasing diagnostic speed. Algorithms
trained on large pediatric datasets can accurately delineate tumor margins, quantify lesion
volume, and even detect skip metastases automatically. Such tools are especially useful in
resource-limited settings where radiologist availability may be constrained. Additionally, the
integration of imaging data with genomic and histopathological profiles through multi-omics
platforms provides a comprehensive disease overview, supporting precision medicine
initiatives. Hybrid imaging systems such as PET/MRI are gaining traction due to their ability to
offer simultaneous anatomical and metabolic insights with lower radiation doses compared to
PET/CT. PET/MRI has been particularly useful in pediatric oncology, where minimizing
radiation exposure is critical. Studies suggest that PET/MRI may surpass conventional
modalities in sensitivity and specificity, especially in detecting small lesions and evaluating
bone marrow infiltration. However, access to such technology remains limited by cost and
infrastructure, emphasizing the need for cost-effective strategies in low- and middle-income
countries. Clinical implementation of multimodal diagnostic algorithms should also consider
psychosocial aspects, including scan time, sedation requirements, and emotional distress in
pediatric patients. MRI and PET procedures often require extended scanning periods, which
may necessitate general anesthesia in younger children. Institutions should develop child-
friendly protocols and provide psychological support to enhance patient cooperation and
reduce anxiety.
Furthermore, future directions include the adoption of functional MRI sequences such as
dynamic contrast-enhanced MRI (DCE-MRI), diffusion-weighted imaging (DWI), and arterial
spin labeling (ASL). These techniques allow for non-invasive evaluation of tumor vascularity,
cell density, and perfusion characteristics, which may correlate with tumor grade and
metastatic potential. Longitudinal studies evaluating the prognostic utility of these parameters
are ongoing, but preliminary evidence supports their incorporation into standard imaging
protocols. Finally, global disparities in imaging access must be addressed to ensure equitable
diagnosis and care for children with osteogenic sarcoma. Partnerships between high-income
and resource-limited regions can facilitate technology transfer, training, and implementation
of tele-radiology networks. Collaborative efforts are essential to bridge diagnostic gaps and
support timely, high-quality imaging services across diverse clinical settings.
Conclusions
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The diagnosis and management of osteogenic sarcoma in children require a multimodal
imaging approach to ensure precision and optimal outcomes. While each modality has
strengths and limitations, their combined use improves tumor characterization, staging, and
treatment planning. Institutional protocols should prioritize access to high-resolution imaging,
particularly MRI and PET, supported by conventional radiography and CT. Standardizing
diagnostic pathways and incorporating advanced tools such as AI and hybrid PET/MRI could
further improve outcomes and streamline care [9].
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