Minute Pulmonary Meningothelial-Like Nodule (MPMN)

Epidemiology and Etiology:

• 7 % of pulmonary resections
• F > M

Common sites:

Gross features:

Histologic features:

• Epithelioid cell nest or whorl in a “Zellballen”-like arrangement centered on a small vein

Immunophenotype:

Marker:

Sensitivity:

Specificity:

Molecular features:

Other features:

• Ultrastructural features resembling meningothelila cells

References: