鼻腔恶性黑色素瘤,文献报道至今尚不足300例,而原发于鼻窦者则更少见。现将我院所遇1例原发于上颌窦者报道如下。患者,男,55岁。在某院X线拍片检查诊为口右侧慢性上领窦炎.而来我院就诊。主诉自1975年始经常右侧弃腔阻塞,偶有脓涕.近3个月来发现右弃腔间歇性流暗红色血性鼻涕伴右额部疼痛,噢觉减退 Malignant melanoma of the nasal cavity, reported in the literature to date is still less than 300 cases, and primary sinuses are less common. One case of primary maxillary sinus encountered in our hospital is reported below. Patient, male, 55 years old. In a hospital X-ray film examination for the right side of the mouth on the chronic upper sinusitis. Come to our hospital. The chief complaint has often been abandoning the obstruction of the right side since 1975, with occasional pustules. In the past 3 months, the right abortion cavity has been found to have intermittent dark red bloody nose with right frontal pain, and the sensation of hypopnea has decreased.