title: Infrared spectroscopic analysis of materials from calcified epithelioma.
abstract: An infrared spectrum of the calcified epithelioma excised from the eyelid of a three-year old girl was observed. Main absorption peaks were assigned as proteins and calcium phosphate. The crystallinity of calcium phosphate was 41%. The relative content of proteins and calcium phosphate was monitored as 7.4:1, reproducing the spectrum of the calcified epithelioma with a mixture of keratin and calcium phosphate. An epithelioma taken from the trunk of a 41-year-old man showed no calcification and the infrared spectrum of this epithelioma showed no absorption peaks of calcium phosphate.
mesh_terms: D000328:Adult; D002114:Calcinosis / Q000378:metabolism*; D002130:Calcium Phosphates / Q000378:metabolism*; D002277:Carcinoma / Q000378:metabolism*; D002675:Child, Preschool; D005142:Eyelid Neoplasms / Q000378:metabolism*; D005260:Female; D006801:Humans; D007633:Keratins / Q000378:metabolism; D008297:Male; D009363:Neoplasm Proteins / Q000378:metabolism*; D012878:Skin Neoplasms / Q000378:metabolism*; D013055:Spectrophotometry, Infrared
chemical_list: D002130:Calcium Phosphates; D009363:Neoplasm Proteins; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; D007633:Keratins; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous