Keratinosomes in psoriatic skin.

Keratinosomes in psoriatic skin can be slightly larger than those in normal skin. Some seem to develop an unusual internal morphology, and some reach their full development while they are still within the immediate Golgi area. Observational evidence indicates that there may be more kerantinosomes in psoriatic skin than are generally found in normal skin. Keratinosomes appear extracellularly from the spinous layer through the horny layer. Some keratinosomes do not move to the outside of the cell and can be seen within cells of the horny layer. There appears to be an increased number of keratinosomes in and between the outer cells of sweat ducts. Keratinosomes are also present within the dark cells of the duct and the extracellular space between the dark cells contains material from keratinosomes.