Fig. 2From: The congenital sternoclavicular sinus: a single-institution retrospective study of 88 patientsHistological examination of the fistula (×10, hematoxylin and eosin staining). a The sinus was lined with squamous epithelium and contained abundant keratinous material and sebum in the lumen. b Remnant of salivary gland was detected in the sinusBack to article page