A pathologist is reviewing biopsy specimens from four different patients who recently underwent neurosurgical resection of central nervous system masses. Match each specific microscopic description below with its most likely definitive pathologic diagnosis.
- Densely cellular regions containing spindle cells with palisading nuclei, alternating with loosely textured, myxoid areas lacking significant cellularity.Schwannoma
- Monomorphic cells demonstrating round nuclei and prominent perinuclear clear spaces, situated within a delicate, anastomosing capillary network.Oligodendroglioma
- Markedly pleomorphic cells featuring zones of serpiginous necrosis bordered by crowded tumor cells, accompanied by prominent endothelial cell hyperplasia.Glioblastoma
- Plump spindle cells arranged in tight, concentric syncytial whorls, accompanied by scattered laminated, basophilic calcifications.Meningioma
Answer
The biphasic spindle cell pattern matches Schwannoma; the perinuclear halo pattern matches Oligodendroglioma; the pseudopalisading necrosis pattern matches Glioblastoma; and the whorled pattern with calcifications matches Meningioma.
Each central nervous system tumor has distinct morphological features on biopsy. Accurate diagnosis requires matching these pathognomonic descriptors—such as Antoni areas for Schwannomas, 'fried egg' cells for Oligodendrogliomas, pseudopalisading necrosis for Glioblastomas, and whorls with psammoma bodies for Meningiomas—to their correct entities to guide surgical and oncological management.
Step-by-Step Solution
Key Concept
Histopathological identification of primary central nervous system tumors.
Estimated Time:1m 30s