ARGENTAFFINOMA
\ˌɑːd͡ʒəntˌafɪnˈə͡ʊmə], \ˌɑːdʒəntˌafɪnˈəʊmə], \ˌɑː_dʒ_ə_n_t_ˌa_f_ɪ_n_ˈəʊ_m_ə]\
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A usually small, slow-growing neoplasm composed of islands of rounded, oxyphilic, or spindle-shaped cells of medium size, with moderately small vesicular nuclei, and covered by intact mucosa with a yellow cut surface. The tumor can occur anywhere in the gastrointestinal tract (and in the lungs and other sites); approximately 90% arise in the appendix. It is now established that these tumors are of neuroendocrine origin and derive from a primitive stem cell. (From Stedman, 25th ed & Holland et al., Cancer Medicine, 3d ed, p1182)
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Word of the day
Snake's-head
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