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  1. Hypervitaminosis - D
    1,25 (OH) Vit D has an antiproliferative effect on several cell types, including keratinocytes, breast cancer cells, and prostate cancer cells. Alopecia is seen in Vit D hypervitaminosis and Vit D receptor mutation. It exerts a PTH like effect and so, as in underlying rickets, calcium is withdrawn from bones but metastatic calcification occurs.
  2. Hypervitaminosis A
    1. Bone pain, headache & vomiting - increased intracranial pressure.
    2. On x ray increased density in metaphyseal region and subperiosteal calcification.

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