婴幼儿皮肤毛发移行疹2例

Cutaneous pili migrans in two infants

报告皮肤毛发移行疹2例。患者1,女,1岁11个月,因右脚掌疼痛1天就诊。皮肤专科检查:右足掌中部外侧缘可见一黑色点状皮损,放大镜观察为一黑色毛发样物深入皮肤,皮表可见残端。用尖镊子钳出后,发现为一长约4 mm黑色较硬的折断毛发,未见毛囊,局部消毒离院。返家后患儿床上发现多根类似毛发。患者2,男,4岁2个月。因左足掌疼痛1个月就诊。皮肤专科检查:左足掌靠近足跟部可见一黑色皮损,放大镜观察可见毛发样物卷曲在皮肤内,末端游离于皮表。用镊子轻轻钳出,发现为一长约6 mm的黑色折断毛发,未见毛囊,局部消毒后离院。返家后患儿床上也发现多根类似毛发。考虑2例患者发病均因成人毛发脱落至床上,患者赤脚接触后刺入足掌皮肤所致,诊断为皮肤毛发移行疹。

Two cases of cutaneous pili migrans were reported.Case 1 was a female patient,aged 1 years and 11 months.She presented with pain in the sole of her right foot for 1 day.Dermatological examination:there was a black punctured skin lesion on the medial and lateral edge of the right paw.Magnifying glass showed that a black hair-like substance penetrated deep into the skin,and the residual end was visible on the skin surface.After being extracted with sharp tweezers,it was found to be a hard black broken hair with a length of about 4 mm.No hair follicle was found,so local disinfection was carried out.Lately,many similar hairs on her bed were found.Case 2 was a male patient,aged 4 years and 2 months.He went to the hospital because of left paw pain for 1 month.Dermatological examination:there was a black skin lesion near the heel of the left paw.Under magnifying glass,the hair was curled in the skin and the end was free from the skin surface.A black broken hair about 6 mm long was found with tweezers.No hair follicle was found.Lately,many similar hairs were also found on his bed.It was considered that the onset of the 2 patients was caused by adult hair shedding on the bed,and the patient′s barefoot contact was followed by stabbing into the skin of the sole of the foot.