Granular cell tumour of the larynx. 1998

L V Victoria, and H T Hoffman, and R A Robinson
Department of Otolaryngology, University of Iowa Hospitals and Clinics, Iowa City, USA.

Granular cell tumour (GCT) is a benign tumour with abundant eosinophilic cytoplasm filled with granules of varying sizes. These granules are the defining characteristic of the GCT and are believed to represent lysosomes in varying stages of fragmentation. The commonly used term granular cell myoblastoma, found in the older literature, is a misnomer because the tumour is clearly not of muscle origin. Among the major theories of origin, some support the tumour's derivation from neuronal tissue, histiocytes, fibroblast or Schwann cells. In the larynx, pseudoepitheliomatous hyperplasia may predispose to confuse the GCT with squamous cell carcinoma. The most common region of GCT is in the head and neck, accounting for approximately 30 to 50 per cent of all lesions. The larynx is relatively an uncommon location for these tumours, accounting for approximately three to 10 per cent of the reported cases. Affected patients typically present with persistent hoarseness, stridor, haemoptysis, dysphagia, and otalgia, but the tumour may be asymptomatic and be discovered only incidentally during a routine examination. Complete excision with an attempt to maintain normal structures generally results in cure. We present the case of a patient with typical features of a GCT of the larynx. The gross appearance, histopathology and brief discussion of the current literature are also presented.

UI MeSH Term Description Entries
D007822 Laryngeal Neoplasms Cancers or tumors of the LARYNX or any of its parts: the GLOTTIS; EPIGLOTTIS; LARYNGEAL CARTILAGES; LARYNGEAL MUSCLES; and VOCAL CORDS. Cancer of Larynx,Laryngeal Cancer,Larynx Neoplasms,Cancer of the Larynx,Larynx Cancer,Neoplasms, Laryngeal,Cancer, Laryngeal,Cancer, Larynx,Cancers, Laryngeal,Cancers, Larynx,Laryngeal Cancers,Laryngeal Neoplasm,Larynx Cancers,Larynx Neoplasm,Neoplasm, Laryngeal,Neoplasm, Larynx,Neoplasms, Larynx
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D016586 Granular Cell Tumor Unusual tumor affecting any site of the body, but most often encountered in the head and neck. Considerable debate has surrounded the histogenesis of this neoplasm; however, it is considered to be a myoblastoma of, usually, a benign nature. It affects women more often than men. When it develops beneath the epidermis or mucous membrane, it can lead to proliferation of the squamous cells and mimic squamous cell carcinoma. Granular Cell Myoblastoma,Myoblastoma, Granular Cell,Cell Myoblastoma, Granular,Cell Myoblastomas, Granular,Cell Tumor, Granular,Cell Tumors, Granular,Granular Cell Myoblastomas,Granular Cell Tumors,Myoblastomas, Granular Cell,Tumor, Granular Cell,Tumors, Granular Cell

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