You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A newborn had bluish swelling over upper eyelid. There was no lid edema or eye involvement and the swelling regressed spontaneously at about one year of age. What is the diagnosis: and explain in detail?
Ans. C. Salmon patchSalmon patch (Nevus Simplex)* Salmon patches are small, pale pink, ill- defined, vascular macules that occur most commonly on the glabella, eyelids, upper lip, and nuchal area of 30-40% of normal newborn infants.* These lesions, which represent localized vascular ectasia, persist for several months and may become more visible during crying or changes in environmental temperature.* Most lesions on the face eventually fade and disappear completely, but those on the posterior neck and occipital areas often persist.* The facial lesions should not be confused with a port-wine stain, which is a permanent lesion.* The salmon patch is usually symmetric, with lesions on both eyelids and both sides of midline.* Port-wine stains are often larger and unilateral, and they usually end along the midline