By What causes colloid milium?
What are the causes of colloid milium? Adult colloid milium is associated with exposure to excessive sunlight, petroleum, and chemicals, although its pathogenesis remains unclear. It is suspected that sunlight ruptures elastin fibres resulting in an accumulation of proteins or fibroblast products in the dermis.
Which colloid is used in skin treatment?
Colloidal sulphur has also been used intramuscularly and intravenously by neuropsychiatrists and internists in the treatment of certain diseases. There are many opinions as to the mode of action of sulphur. chemical reactions that occur when it is applied to the skin.
What is a colloid milium?
Colloid milium is a rare cutaneous condition with at least three distinct subtypes, characterized clinically by the development of yellowish translucent papules or plaques on sun-exposed skin, and histologically by the presence of colloid in the dermal papillae.
What is colloid skin?
Colloid milium is a rare degenerative skin disorder known by the development of small translucent, yellowish brown pappular nodules or plaques, generally located in sun exposed areas. Clinically they are of two types, adult and juvenile type.
How do you treat colloid milium?
For colloid milium, no treatment is available that is entirely satisfactory. Dermabrasion, cryotherapy, and diathermy have been tried with limited success. Advice about sunscreen use may also be helpful. Systemic ascorbic acid and exfoliating agents have also been tried with variable results.
What is the histological description of colloid?
Histopathological features of adult colloid milium include: Deposits of homogenous, amorphous, faintly eosinophilic material with dividing clefts and fissures, which extend into the papillary and mid-dermis [2,3] Fibroblasts lining the clefts, which can contain lymphocytes and mast cells [12] Lack of inflammation.
How do you treat colloid Milium?
What is hardy Schulze rule?
> Hardy Schulze rule states that the amount of electrolyte required for the coagulation of a definite amount of a colloidal solution is dependent on the valency of the coagulating ion. Hardy and Schulze observed that greater the valency of the flocculating ion or coagulating ion, the greater is its power to coagulate.
What is colloid degeneration?
INTRODUCTION. Nodular colloid degeneration (NCD) is a rare cutaneous deposition disorder characterized by a single large nodule or multiple soft to rubbery plaques or nodules occurring over sun-exposed regions. Colloid material deposits in the upper dermis characterize the disorder.
How are colloids purified?
The colloidal particles cannot pass through a parchment or cellophane membrane while the ions of the electrolyte can pass through it. So the colloids are purified by the dialysis process.
Is gold a protective colloid?
The coagulation of gold sol results in an increase in particle size, indicated by a colour change from red to blue or purple. The higher the gold number, the lower the protective power of the colloid, because a greater amount of colloid is required to prevent coagulation….Gold number.
| Protective Colloid | Gold Number |
|---|---|
| Dextrin | 125-150 |
What is flocculation value?
Flocculation value is defined as the minimum concentration required of an electrolyte to cause the coagulation or flocculation of a solution. Flocculation value is inversely proportional to the coagulating power of the ion.