English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Relevance: Peripheral primitive neuroectodermal tumor (primitive neuroectodermal tumor – PNET) belongs to the group&#x0D;of malignant tumors that develop from migrating embryonic neural crest cells. PNET includes several nosological forms: Askin’s&#x0D;tumor, esthesioneuroblastoma, the very peripheral primitive neuroectodermal tumor, and Ewing’s sarcoma. PNET accounts for&#x0D;3–9% of all soft tissue tumors and 19% of all soft tissue sarcomas in children. In Europe and the US, PNETs account for 3.4 cases&#x0D;per year per 1 million children below 15 years; in Kazakhstan – 0.6-1.2 cases per 1 million child population. Rapid tumor growth,&#x0D;malignancy, and early metastasis to other organs and systems predetermine the PNET’s specific role in oncology.&#x0D;The purpose of the study was to improve the quality and availability of early sarcoma diagnostics in children at medical&#x0D;institutions of the general medical network.&#x0D;Results: 35 cases of peripheral PNET in children were analyzed. The age of the patients was 1.5 to 17 years, the average age –&#x0D;9.3 years. Boys were 1.3 times more than girls. One patient (3.6%) had extra-skeletal tumor localization. Children with stage IIB&#x0D;prevailed – 46.4% of cases (13 children).&#x0D;Radiographical differentiation between Ewing’s sarcoma and primary chronic or “healed” (antibiotic) acute hematogenous&#x0D;osteomyelitis in the initial phase of the process is almost impossible before the extraosseous soft tissue component is formed.&#x0D;The bone damage process is more often localized in the bone diaphysis and subsequently spreads to its metaphyses.&#x0D;Conclusion: PNET is more likely to come from the chest wall, so it is advisable to start the X-ray examination from the chest.&#x0D;In terms of radiation semiotics, PNET is similar to Ewing’s sarcoma and Askin’s tumor; therefore, an additional immunohistochemical study of the tumor tissue is required. An important indirect diagnostic criterion in Ewing’s sarcoma is the predominance of the soft tissue component over the bone manifestations. Extended CT and MRI studies with contrast enhancement&#x0D;(chest, abdominal cavity, pelvis, and the primary lesion area) and skeletal scintigraphy are required to clarify the extent of&#x0D;changes, stage the tumor accurately, and assess the tumor dynamics after treatment. The above conclusions generally confirm&#x0D;the available literature data.

onkologiâ i radiologiâ kazahstana

Radiation diagnostics of peripheral primitive neuroectodermal tumors (PNET) in children at the Scientific Center of Pediatrics and Pediatric Surgery (Almaty, Kazakhstan)