LEUCEMIA CEL PELUDAS Flashcards

(9 cards)

1
Q

Célula proliferante característica.

A

Linfocito B maduro “peludo”.

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2
Q

¿Mutación clásica en HCL?

A

Mutación BRAF V600E

≈ 90% de los casos

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3
Q

¿Qué produce la mutación BRAF V600E?

A

Activación constitutiva de la vía MAPK, → proliferación de células B

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4
Q

Tinción diagnóstica clásica.

A

TRAP positiva

Fosfatasa ácida resistente al tartrato (TRAP) positiva

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5
Q

Hallazgos característicos.

A

Esplenomegalia masiva + pancitopenia + infecciones recurrentes

Infecciones por micobacterias atipicas (listeria)

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6
Q

¿Por qué hay pancitopenia en HCL?

A

Infiltración medular difusa + fibrosis → médula “seca” (dry tap)

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7
Q

¿Hay adenopatías?

A

No.

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8
Q

Tratamiento gold standard.

A

Cladribina (2-CDA)

(🚫ADA)

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9
Q
  • Principal diagnóstico diferencial de HCL:
  • ¿Cuál es la diferencia?
A
  • HCL variante (HCL-v).
  • HCL-v: NO expresa CD25
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