Figure 5
From: Multiple dermoid sinuses of type Vb and IIIb on the head of a Saint Bernard dog
Microphotograph of a dermoid sinus. The figure shows on the left an open sinus surrounded by follicular units, and on the right two deep cysts. The dermis above the cysts contains few or no adnexa, and the epidermis is thin with an abrupt transition to hyperplastic epidermis on the right of the section. Skin and sub-cutis, dog. Bar = 1000 μm, haematoxylin and eosin stain.