Carcinoma of Tongue

TONGUE CARCINOMA
  • The tongue is the most common intraoral site of cancer in most countries.
  • The disease affects males more frequently than females, with a male-to-female ratio of 2:1.
Etiology: Tobacco,
Alcohol,
  • Other factors: Areca catechu tree,the betel nuts or quid as well as the use of slaked lime
  • Detection of mutations in tumor suppressor genes TP53.
Pathophysiology
  • more than 90% of oral cavity cancers are squamous cell carcinomas. Most of the other lesions are of minor salivary gland origin. Lymphomas, melanomas, and sarcomas rarely occur in the tongue.
  • Squamous cell carcinoma is by far the most common malignancy of the tongue, typically having 3 gross morphologic growth patterns: exophytic, ulcerative, and infiltrative. The infiltrative and ulcerative types are observed most commonly on the tongue.
  • lateral border being the most common subsite of origin.
Premalignant lesions
  • Leukoplakia and erythroplakia 
  • Clinical Presentation
  • weight loss, dysphagia and odynophagia, referred otalgia, hemoptysis, neck mass, hoarseness, and articulation difficulties
  • Most common site of carcinoma tongue is middle of lateral border or the ventral aspect of the tongue followed by tip and dorsum.
  • In carcinoma base of tongue pain is referred to the ipsilateral ear because of the common nerve supply of the base of tongue and ear i.e. Glossopharyngeal nerve.
  • incidence of cervical lymphnode metastasis Posterior tongue —> 70%
Classification of stage of tumor of oral cavity based on size of lymph node
  1. N0: There is no evidence of regional metastasis
  2. N1: Metastasis occur to a single ipsilateral lymph node, 3 cm or less in greatest dimension
  3. N2a: Metastasis in single ipsilateral lymph node, >3 cm and
  4. N2b: Metastasis occur in multiple ipsilateral lymph nodes, all nodes
  5. N2c: Metastasis occur in bilateral or contralateral lymph nodes, all nodes
  • Treatment of oral tongue cancer is primarily surgical, with wide local excision and negative margin control.
  • Small tumors (T1- T2)- may be removed by wide local excision and primary closure or closure by secondary intention.
  • Excision of larger tumors - requires partial glossectomy or hemiglossectomy.
  • Schwartz writes- "The CO2 laser may be used for excision of early tongue cancers or for ablation of premalignant lesions."
  • If regional lymphnodes are involved- Modified radical neck dissection or selective neck dissection is done.
  • Indications for postoperative radiation therapy include evidence of perineural or angiolymphatic spread or positive nodal disease.
  • T1 stage (< 2cm in size): Insterstitial irradiation or excision (partial glossectomy).
  • T2 stage (> 2 cm) in size: External beam radiotherapy or hemiglossectomy
Exam Question
  • A patient has carcinoma of right tongue on its lateral border of anterior 2/3rd, with lymph node of size 4 cm in level 3 on left side of the neck, stage of disease is N2.
  • In carcinoma base of tongue pain is refered to the ear through Glossopharyngeal nerve.
  • A patient with carcinoma of tongue is found to have lymph nodes in the lower neck. The treatment of choice for the lymph nodes is Radical neck dissection.
  • Radiotherapy is used for which stage-I cancer -Anterior 2/3rd of Tongue.
  • A patient presented with a 1 x 1.5 cms growth on the lateral border of the tongue. The treatment indicated would be Laser ablation.
  • Carcinomatous ulcers are painless but may become painful in advanced stages, with extension into surrounding tissues.
  • Commonest site of carcinoma tongue is Anterior 2/3 of Lateral borders
  • Carcinoma tongue less than 2 cm is treated by Excision
  • Tobacco chewing is a risk factor for Tongue Carcinoma.
  • Lymph node invovlement occurs in case of Tongue Carcinoma.
  • 60 year old man presents with an ulcer on lateral margin of tongue also complains of ear pain, most probable diagnosis is Carcinomatous Ulcer.
  • Tongue carcinoma is usually Radio-sensitive.
  • Posterior tongue most commonly metastasizes to cervical lymph nodes.
  • Referred pain in the ear is commonly from Carcinoma of Tongue.
  • Most common histological type of carcinoma of tongue is Squamous cell carcinoma.
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