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Tumeurs osseuses pediatriques - F. Dijoud.pdf - AFIAP

Tumeurs osseuses pediatriques - F. Dijoud.pdf - AFIAP

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Chondroblastome<br />

• Aspects macroscopiques<br />

– Biopsie curetage +/- grains blancs<br />

• Aspects microscopiques<br />

– Prolifération cellules rondes<br />

• cytoplasme clair ou éosinophile<br />

• Noyau ovalaire, incisuré<br />

• Mitoses sans atypie<br />

– Stroma d’aspect chondroïde<br />

– Ilots cartilagineux<br />

– Cellules géantes<br />

– Calcifications péri cellulaires (grillage de poulailler)<br />

– Remaniements anévrismatiques : 1/3 cas<br />

• Immunophénotype<br />

– PS100 et vimentine

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