Lateral sublingual dermoid

Diagnosis of dermoid cyst of the floor of the mouth by fine-needle aspiration cytology: A case report

“…[3][4][5][6] With noncongenital cases, they are thought to occur possibly as a result of traumatic occlusion of hair follicles or sebaceous glands. [7][8][9] Most commonly, dermoid cysts occur in the midline of the floor of the mouth. 1 They can occasionally occur lateral to the floor of the mouth and in other locations.…”

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

“…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. 20,43,62 On palpation, the swelling of the floor of the mouth has a soft, doughy consistency and exhibits pitting after compression.…”

“…55,57 Involvement of the tongue has also been reported, 46,59 as has the occurrence of multiple dermoid cysts. 1,9 The differential diagnosis for cystic lesions at this site is large and includes ranula, 35 sublingual mucous retention cyst, 35 mucocele, 19 unilateral or bilateral blockage of Wharton's ducts, thyroglossal duct cyst, 52,58,59 cystic hygroma, 51,56 branchial cleft cysts, infection, benign mesenchymal tumors (such as lipoma, fibroma, hemangioma, cavernous angioma and neurofibroma 19 ) benign salivary gland tumors (such as pleomorphic adenoma 56 and Warthin's tumor) and malignant salivary gland tumors (such as mucoepidermoid tumor 56 and sarcoma), Hodgkin's disease and non-Hodgkin's lymphoma. 11 Clinically it is not considered possible to distinguish dermoid cyst from these other entities, 67 and most authors maintain that the final diagnosis can be made only by histopathologic examination of the resected specimen.…”

“…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. 32 Dermoid cysts can be classified by either the gross anatomic relationships of the cysts to surrounding structures or their histologic appearance.…”

“…20,26,38,59 Typically, the squamous epithelium is compressed and thin, 8,20 and the keratin layer of the squamous epithelium has a characteristic lamellated appearance. 9 The spectrum of skin appendages varies from case to case. 13 According to Bailey, 4 sublingual dermoids seldom, if ever, contain hair follicles, while Meyer reported the presence of hair follicles in three of four cases.…”