title: Lymphoid aggregations in the oesophagus of the toad (Bufo melanostictus).
mesh_terms: D000818:Animals; D002025:Bufonidae / Q000033:anatomy & histology*; D004947:Esophagus / Q000166:cytology*; D005399:Fishes / Q000033:anatomy & histology; D006654:Histology, Comparative; D008214:Lymphocytes; D008854:Microscopy, Electron; D010950:Plasma Cells