Figure. Linguatula serrata nymphs in lung tissue. Main panel shows the parasite's serrated nature and the cuticular spines (magnification ×200, Masson trichrome stain). Right upper inset, pulmonary nodule with prominent fibrotic reaction and shed cuticle around 1 nymph (magnification ×200, Masson trichrome stain). Left lower inset, detailed view of 1 parasite hook (magnification ×630, hematoxylin and eosin stain).