Short Anagen Syndrome.

Skinmed Pub Date : 2024-10-22 eCollection Date: 2024-01-01
Jonathan Young, Michaela Mifsud, Liam Mercieca
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Abstract

A 10-year-old healthy, Caucasian girl presented in May 2021 with short and thin scalp hair since birth (Figures 1A-C). She had achieved all of her developmental milestones, and her parents denied any similar family history. She had only two hair cuts in the past, which were performed to trim long hair over the midscalp to have a uniform length. Hair at the front, back, and sides of the scalp were never trimmed. Examination revealed short, dark, and thin hair, varying in length from a few millimeters to 2 cm, over the frontal, parietal, and occipital areas. Longer hair were present over the midscalp, varying in length from 5 cm to 8 cm. The hairpull test was negative, and dermatoscopic examination of short hair demonstrated tapered ends, rather than cut ends. Microscopic examination revealed no hair shaft abnormality, and a trichogram of 50 parietal hair fibers demonstrated an anagen versus telogen ratio of 68:32. No associated skin, dental, or nail abnormalities were discovered.

短促青春期综合征
2021 年 5 月,一名 10 岁的健康高加索女孩因出生后头皮毛发短而稀疏前来就诊(图 1A-C)。她已达到所有发育里程碑,其父母否认有类似家族史。她过去只剪过两次头发,都是为了修剪头皮中部以上的长发,使其长度一致。头皮前部、后部和两侧的头发从未修剪过。检查结果显示,患者前额、顶叶和枕部的头发短而黑、稀疏,长度从几毫米到 2 厘米不等。头皮中部的头发较长,长度从 5 厘米到 8 厘米不等。拉发试验呈阴性,皮肤镜检查显示短发末端呈锥形,而不是切端。显微镜检查没有发现毛干异常,对 50 根顶端毛发纤维进行的三叉图显示,生长期与休止期的比例为 68:32。没有发现相关的皮肤、牙齿或指甲异常。
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