<prompt> Histological appearance of scleroderma include all exceptExtensive fibrosis of upper 13 of the dermisDecreased adnexal structure.Homogenization of collagenIncreased dermis thickness  <response>: Ans: A Extensive fibrosis of upper 13 of the dermis Mucin deposition is a feature of metabolic diseases like pretibial myxedema, scleroderma and lichen myxedematosis. Microscopy appearance of scleroderma- Thinning of epidermis, extensive fibrosis of lower 23 of dermis, replacement of subcutaneous fat, homogenization of collagen and decreased adnexal structure. 