患者,女性,65岁,农民。1986年9月以左额部肿疼伴发热20天就诊。四年前不明原因出现间歇性鼻塞、头痛及脓血性涕,抗炎治疗有效。1年前突然发热,头痛加重,左额部肿痛隆起,在当地按脓肿切开排脓治疗后头痛减轻,发热及局部肿疼消退,但脓血涕仍存在;近半年来左额部麻木增厚,于20天前又出现发热,再次于原位突起一肿块,头痛进一步加重并有 Patient, female, 65 years old, farmer. September 1986 to the left forehead swelling and pain with fever 20 days treatment. Four years ago, there was an intermittent obstruction of the nose, headache, and purulent bloody runny nose. Anti-inflammatory treatment was effective. 1 year ago suddenly fever, increased headache, swelling of the left forehead swollen, abscess in the local cut abscess after treatment to reduce headache, fever and local swelling and pain subsided, but there still pus and blood; the past half of the left forehead numbness Thickening, fever appeared again 20 days ago, once again raised a lump in situ, headache further aggravate and there