Fig. 3. Dorsal root ganglia 28 days after intrathecal resiniferatoxin administration. Damaged and dead neurons are replaced by proliferating satellite cell colonies called nodules of Nageotte ( black arrows ), which can be seen as collections of small cells with small basophilic nuclei forming rosette-like structures around disintegrating neuronal bodies ( red arrowheads ). Bars : 100 μm ( A ) and 25 μm ( B ).