Figure 1.

(a) Macroscopic images of the received tissue; a cystic structure measuring 25 mm and a stalk‐like structure measuring 40 mm in length. (b–e) Microscopic images of the oesophageal duplication cyst. Despite significant delay in fixation, the structures were preserved enough for adequate histological examination. (b) Cystic structure lined by colonic‐type mucosa with a double‐layered smooth muscle wall (H&E, 20×). (c) Colonic mucosal lining with a layer of smooth muscle within the wall (H&E, 100×). (d) Specialised gastric mucosal lining with a layer of smooth muscle within the wall (H&E, 100×). (e) Squamous epithelial lining with a double layer of smooth muscle within the wall (H&E, 100×).