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What is Which of the following condition is associated with Gottron's sign? and explain in detail?
Gottron's sign is a characteristic feature of dermatomyosistis. It is a violaceous, erythematous, symmetrical rash that occur on the extensor surface of the metacarpophalangeal and interphalangeal joints. Similar lesions can also occur over the elbow and knees. Other features of dermatomyositis are -heliotrope rash which is a reddish purple rash that occur on the eyelids which is associated with swelling of the eyelid. -Periungal erythema -abnormal nail bed capillary loops and -cracking of the skin of the tips of fingers are also seen in dermatomyositis.