Quiste dermoide verdadero en piso de boca / True dermoid cyst in the floor of the mouth

Los quistes dermoides son lesiones benignas de origen embrionario, con una incidencia del 0,01 por ciento de todos los quistes de la cavidad bucal. No presenta predicción por sexo y alrededor del 60 por ciento de los casos se desarrollan entre los 15 y 35 años de edad. El conocimiento de los hallazgos clínicos de este tipo lesiones es vital para un diagnóstico definitivo, sin embargo, este siempre debe ser corroborado mediante exámenes histopatológicos, especialmente, al realizar un diagnóstico diferencial entre los diferentes tipos de quiste dermoides u otras alteraciones a nivel oral con manifestaciones clínicas similares. El propósito de esta presentación reportar un caso clínico para ampliar conocimientos sobre el diagnóstico y tratamiento de este tipo de lesión debido a su infrecuencia en cavidad oral. La ubicación inusual de estos quistes en cavidad oral hace que, aún con una buena valoración clínica e imaginológica, el diagnóstico prequirúrgico preciso sea difícil. Es por esto que el tratamiento quirúrgico no sólo evita el riesgo de una complicación infecciosa y eventual malignización sino que permite obtener un diagnóstico definitivo mediante estudios histopatológicos(AU)

Dermoid cysts are benign lesions of embryonic origin, with an incidence of 0.01 percent of all cysts in the oral cavity. There is no prediction by sex and about 60 percent of cases develop at the age of 15 to 35 years old. Knowledge of the clinical findings of such injuries is vital for a definitive diagnosis; however, this should always be confirmed by histopathological examination, especially when making a differential diagnosis between different types of dermoid cyst or other pathologies with similar clinical manifestations. The purpose of this article is to expand knowledge about the diagnosis and treatment of this type of injury because of it is not frequent in the oral cavity. The unusual location of these cysts in the oral cavity makes hard the precise preoperative diagnosis, even with good clinical and radio-graphical assessment. The surgical treatment not only prevents the risk of infectious complications and possible malignancy but also, allows obtaining a definitive diagnosis by a histopathological study(AU)

Analysis of the factors influencing cervical lymphatic metastasis of the floor of mouth carcinoma / 中国癌症杂志

Purpose:To investigate the local factors that influenced cervical lymphatic metastasis and prognosis of the floor of mouth carcinoma.Methods:A retrospective study was undertaken of 65 patients with squamous cell carcinoma of floor of mouth, who were treated between 1983 and 1998. Local factors including the tumor location, the tumor size, local invasion and pathological differentiation were investigated for the correlation with cervical lymphatic metastasis and prognosis of the disease.Results:Cervical lymphatic metastasis was 46.2% (30/65) for these 65 patients, and 96.6% of the involved lymph nodes were located in level Ⅰ(submandibular region) of the neck. Of these 65 patients, cervical lymphatic metastasis was 62.2% and 40.0% for 45 anterior and 20 posterior floor of mouth carcinoma, respectively ( P = 0 .096).Cervical metastasis was 59.5% and 21.7% for tumor size greater than or less than 3 cm, respectively ( P = 0.003).Cervical metastasis was 46.8% and 44.4% for tumors invading the tongue or not, respectively.Cervical metastasis was 60 0% and 42 0% for tumors invading the gum or not, respectively.Cervical metastasis was 76.5% for the poorly differentiated and was 42.1% for the moderately and well differentiated squamous cell carcinoma ( P = 0.018). The overall 5 years survival was 46.4% for the 65 patients. The 5 years survival was 61.4% for these without cervical metastasis and 28.9% for these with cervical metastasis ( P = 0.0013).Conclusions:The local factors such as the tumor size greater than 3 cm, tumor invasion to the tongue and the gum, and the poorly differentiated squamous cell carcinoma of floor of mouth increased the incidence of cervical metastasis, and therefore adversely influenced the prognosis.

Unsuccess Cause Analysis of Pedunculated Flaps Reconstructed the Defect of Floor of the Mouth / 中国医师杂志

Objective To analyze the reason of necrosis for pedunculated skin flaps repaired after floor of the mouth defect repair.Methods 56 cases of pedunclated-flaps restoring the floor of the mouth from 1996 to 2001 were reviewed, and pedunclated-flap repair was performed after operation in 11 cases suffering from malignant tumors in the floor of the mouth, and 5 kinds of pedunculated flaps were compared.Results Five kinds of pedunculated flaps were used to reconstruct the floor of the mouth defects. Its successful sequence was as following: forehead flap, pectoralis major myocutaneous flap, sternocleidomastoid flaps,trapezius myocutaneous flaps, and subhyoid flap.Conclusions Causes of those flaps necrosis might relate to furnishing blood with supplied-flaps region and structure of anatomy in received-flaps region, also it is related to operater's skill.So the reason of repair failure of skin flaps with pedicle needs comprehensive analysis.

Dermoid Cyst Of The Floor Of The Mouth

Dermoid cyst has evolved to represent any cyst filled with sebumlike and with evidence of specialized skin derivatives from defective embryonic development. Approximately 7% of all dermoid cyst arise in the head and neck region and 0.01% of all oral cysts. The anterior region of the floor of the mouth is the most common site of occurrence in the oral cavity. There is no sex predilection and the age at presentation is usually in the second or third decades. Clinically, the lesions present as a rubbery or doughy mass that vary in size from a few millimeters to 12 cm. An intraoral dermoid cyst usually presents as a slowly growing, painless swelling in the anterior floor of the mouth which may eventually cause elevation and displacement of the tongue resulting in dysphonia, dysphagia and dyapnea. Treatment involves surgical removal and recurrences have not been reported. We report three cases of dermoid cyst that were cared successfully in the department of dentistry, Kyung-pook National University. One case is a sublingual type, another case is a geniohyoid type, and the other is a lateral type.

A Case of Cystic Teratoma on the Floor of the Mouth in Neonate

Cystic teratoma on the floor of the mouth is infrequent disease and known as congenital origin. Teratoma has no sex distribution. Treatrnent of the cystic teratoma is completely surgical excision and recurrence is rare. The authors have experienced a case of cystic teratoma on the floor of the mouth in neonate. We reported this case with review of literatures.