Primary melanoma of the esophagus is not frequently encountered clinically but rather high degree malignant that have a poor prognosis.
食道的原发性黑色素瘤在临床上是不常见的，但却是极恶性且有不好的预后。
Primary melanoma of the esophagus is not frequently encountered clinically but rather high degree malignant that have a poor prognosis.
食道的原发性黑色素瘤在临床上是不常见的，但却是极恶性且有不好的预后。
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