Pathology: schwannoma

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with loose fascicular pattern

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia; inconspicuous mitotic activity

  • Ectatic vessels with hyalinized walls

  • IHC: S100

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with loose fascicular pattern

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia; inconspicuous mitotic activity

  • Vessels with hyalinized walls

  • IHC: S100

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with loose fascicular pattern

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia; inconspicuous mitotic activity

  • Ectatic vessels with hyalinized walls

  • IHC: S100

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle-epithelioid cells with loose fascicular and rosette-like patterns

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia; inconspicuous mitotic activity

  • Dystrophic calcification

  • IHC: S100, SOX10, epithelial membrane antigen

  • PMID: 10193326

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with loose fascicular and microcystic pattern

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia and occasional palisading; inconspicuous mitotic activity

  • IHC: S100, SOX10

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with loose fascicular and microcystic pattern

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia and occasional palisading; inconspicuous mitotic activity

  • IHC: S100, SOX10

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with loose fascicular and microcystic pattern

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia and occasional palisading; inconspicuous mitotic activity

  • IHC: S100, SOX10

Schwannoma

  • Circumscribed; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with loose fascicular pattern

  • Eosinophilic cytoplasm

  • Ovoid hyperchromatic nuclei with mild atypia; inconspicuous mitotic activity

  • Occasional small hyalinized vessels

  • IHC: S100, SOX10

Schwannoma, cellular

  • Lobulated with peripheral lymphocytic cuff

  • Spindle cells with vague fascicular pattern

  • Eosinophilic cytoplasm

  • Ovoid nuclei with small nucleoli and mild atypia; rare mitotic activity

  • Inconspicuous vasculature

  • IHC: S100, SOX10

  • PMID: 2400975

Schwannoma, plexiform

  • Ill-defined margin; areas of hyper- ("Antoni A") and hypo- ("Antoni B") cellularity

  • Spindle cells with nodular pattern

  • Eosinophilic cytoplasm

  • Ovoid monomorphic nuclei with inconspicuous mitotic activity

  • IHC: S100

  • PMID: 9568513