Dermoid cyst of the floor of the mouth. Report of a case

Liesegang Rings in a Dermoid Cyst of the Floor of the Mouth

“…They seem to arise from multipotential cells entrapped during the midline closure of either the first or second branchial archs in the third or fourth week of development. [12][13][14] Alternatively, they might be derived from traumatic occlusion of hair-bearing follicles or sebaceous glands. 12 Their clinical features depend on their location.…”

Sub-Lingual Epidermoid Cyst

“…The cyst is described as epidermoid when the lining presents only epithelium, dermoid when skin adnexa are found and as teratoid cyst when other tissues like muscle, cartilage, bone are present within the cyst [2]. Histologically, this distinction of the cysts in the floor of the mouth was presented by Meyer in 1955 [3]. Dermoid cysts of the floor of the mouth are dis-embryogenetic lesions derived from entrapment and subsequent growth of epithelial cells during the midline fusion between the first and second branchial arches in the third and fourth embryonic weeks [4].…”

Dermoid Cyst of the Floor of the Mouth Diagnosed by Fine Needle Aspiration Cytology

“…62 They are generally thought to arise from germinal epithelial rests that have been enclavated during the midline closure of either the embryonic first or second branchial arches during the third or fourth week of development. 8,20,35,41,48,64 For noncongenital cases, another hypothesis is that they derive from traumatic occlusion of piliferous follicles or sebaceous glands. 8,9,45 It is thought that lesions without skin appendages may result from pneumatic implantation of surface epithelium, which then proliferates and keratinizes without producing dermal appendages.…”

“…33 Due to interference with the mobility of the tongue, sublingual dermoid cysts can cause problems with articulation, speech 11 and mastication; dysphagia 22,39,53 ; dyspnea 33 ; and obstructive sleep apnea. 21 12 Infection, which fortunately occurs rarely, 48 is one of the main causes of rapid enlargement of the cysts 67 and is sometimes due to iatrogenic causes. 9 When infected, sinus tracts to the skin or intraoral sites can develop.…”