Electron microscopic study of the colloid-like substance in solar elastosis.
We have made electron microscopic studies on the elastotic material of solar elastosis which developed in cutis rhomboidalis nuchae taken from 10 males, 50-83 years of age. It was revealed that this material of the cutis rhomboidalis nuchae contained a colloid-like substance consisting of both a fine granular and an amorphous component. The colloid-like substance closely resembled that which is seen in the adult-type colloid milium, and could not be distinguished from it under light microscopy. In view of the morphological similarity at the ultrastructural level between the elastotic material and the colloid-like substance, it was proposed that normal elastic fibers can change into elastotic material and then further degenerate into the colloid-like substance, eventually becoming the typical colloid substance seen in colloid milium.
Matsuta
M
M
Kunimoto
M
M
Kosegawa
G
G
Akasaka
T
T
Kon
S
S
D000368:Aged; D000369:Aged, 80 and over; D003102:Colloids; D004547:Elastic Tissue / Q000473:pathology*; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D012871:Skin Diseases / Q000209:etiology / Q000473:pathology*; D013472:Sunlight / Q000009:adverse effects*
D003102:Colloids