Polyglobulies Flashcards

(12 cards)

1
Q

Signes cliniques

A
  • erythrose cutanéo muqueuse
  • céphalées récurrentes
  • acouphènes vertiges
  • troubles visuels
  • Paresthésies des extrémités
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2
Q

Polyglobulies de Vaquez : physiopathologie

A

Progeniteurs erythroblastiques poussent sans apport en EPO = autonomes
Mutation de la kinase JAK2 active mimant l’EPO

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3
Q

Hémogramme PV

A

Augmentation des 3 lignées
- augmentation hématocrite
- augmentation hémoglobine
- hyperleucocytose à PNN
- thrombocytose modérée

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4
Q

EPO PV

A

Diminué

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5
Q

Mutation PV

A

Mutation activatrice JAK2 V617F

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6
Q

Examen de certitude d’une PV

A

Volume globulaire total > 1235% de la valeur théorique

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7
Q

Vraies polyglobulies secondaires

A

Hypoxie : altitude, tabac, insuffisance respi, apnée du sommeil, monoxyde de carbone, insuffisance cardiaque

Origine tumorale

—> EPO augmentée

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8
Q

Fausse polyglobulie

A

Hemoconcentration
Mesure du volume plasmatique (déshydratation)

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9
Q

Traitement d’urgence

A

Saignées

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10
Q

Traitement de fond

A

Hydroxyurée (agent cytotoxique)
Pipobroman
Interféron alpha
Inhibiteur JAK 2 : Ruxolitinib

Anti plaquettaires : aspirine faible dose

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11
Q

Complication immédiate

A

Thrombose

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12
Q

Complication à long terme

A

Myelofibrose et leucémie aiguë

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