What neoplasm is identified by the presence of Verocay bodies or Antoni A/B under microscopy?

What neoplasm is identified by the presence of Verocay bodies or Antoni A/B under microscopy?

• A. Neurofibroma
• B. Schwannoma
• C. Rhabdomyosarcoma
• D. Fibromatosis

Answer: (B)

The presence of Verocay bodies and the distinction between Antoni A and B patterns are characteristic features of Schwannomas when examined under microscopy. Schwannomas, also known as neurilemomas, arise from Schwann cells, which are responsible for the myelin sheath surrounding nerves. Antoni A regions are characterized by tightly packed spindle-shaped cells with a high degree of cellularity, while Antoni B areas are less cellular with a looser arrangement of cells. Verocay bodies, which are actually palisades of nuclei that form around acellular eosinophilic (pink-staining) zones, are a hallmark of Antoni A areas within Schwannomas. This unique histological pattern helps in the diagnosis of Schwannomas and distinguishes them from other neoplasms that do not exhibit these specific features. In contrast, while neurofibromas may share some commonalities with Schwannomas as they also originate from nerve sheath cells, they do not exhibit the specific presence of Verocay bodies or the same histological patterns. Rhabdomyosarcoma and fibromatosis involve different histological features altogether and do not relate to Schwann cell tumors.

The presence of Verocay bodies and the distinction between Antoni A and B patterns are characteristic features of Schwannomas when examined under microscopy. Schwannomas, also known as neurilemomas, arise from Schwann cells, which are responsible for the myelin sheath surrounding nerves.

Antoni A regions are characterized by tightly packed spindle-shaped cells with a high degree of cellularity, while Antoni B areas are less cellular with a looser arrangement of cells. Verocay bodies, which are actually palisades of nuclei that form around acellular eosinophilic (pink-staining) zones, are a hallmark of Antoni A areas within Schwannomas. This unique histological pattern helps in the diagnosis of Schwannomas and distinguishes them from other neoplasms that do not exhibit these specific features.

In contrast, while neurofibromas may share some commonalities with Schwannomas as they also originate from nerve sheath cells, they do not exhibit the specific presence of Verocay bodies or the same histological patterns. Rhabdomyosarcoma and fibromatosis involve different histological features altogether and do not relate to Schwann cell tumors.