Division of Plastic Surgery, Department of Surgery, Northwestern Feinberg School of Medicine, Chicago, IL, USA.
Hansjörg Wyss Department of Plastic Surgery, NYU School of Medicine, New York, NY, USA.
Aesthet Surg J. 2021 Oct 15;41(11):1293-1302. doi: 10.1093/asj/sjab082.
Achieving an aesthetic phalloplasty result is important for patients with acquired or congenital defects of the penis, or with genital-related dysphoria. However, aside from length and girth, the aesthetic proportions of the male penis have not been defined.
This study aimed to determine proportions of the male penis through photogrammetric analysis of nude male photographs and to verify these proportions with a crowdsourcing-based survey.
Nude male photographs (n = 283) were analyzed to define aesthetic proportions of the male penis. Photographs were analyzed for the position of the penis on the torso in relation to the umbilicus and for the ratio of the dorsal and ventral glans of the penis in relation to the entire shaft length. Proportions were then further studied by crowdsourcing 1026 respondents with Amazon mechanical Turk.
The ideal position of the penis below the umbilicus is about 55% (6/11th) of the distance from the jugular notch to the umbilicus (measured average, 53.6%; survey-weighted average, 58.9%). The dorsal glans of the penis is about 33% (1/3rd) of the length of the entire shaft (measured average, 32.1%; survey-weighted average, 37.5%). The ventral glans of the penis is about 12.5% (1/8th) of the length of the entire shaft (measured average, 12.6%; survey-weighted average, 11.7%).
Measured proportions of the human penis follow exact fractions. Crowdsourcing data helped support photogrammetric analysis, with survey-preferred ratios within 5% of measured ratios. With further validation, these data can aid surgeons performing phalloplasty.
对于阴茎先天或后天缺陷或与生殖器相关的性别焦虑的患者来说，实现阴茎美学效果非常重要。然而，除了长度和周径，男性阴茎的美学比例尚未确定。
本研究旨在通过对裸体男性照片的摄影测量分析来确定男性阴茎的比例，并通过基于众包的调查来验证这些比例。
分析裸体男性照片（n=283），以确定男性阴茎的美学比例。分析照片中阴茎在躯干上的位置与脐部的关系，以及阴茎龟头的背侧和腹侧与整个阴茎干长度的比例。然后通过亚马逊机械 Turk 众包 1026 名受访者进一步研究这些比例。
阴茎位于脐下的理想位置大约是从颈静脉切迹到脐部距离的 55%（11 等分中的 6 等分）（平均测量值为 53.6%；调查加权平均值为 58.9%）。阴茎龟头的背侧大约是整个阴茎干长度的 33%（1/3 等分）（平均测量值为 32.1%；调查加权平均值为 37.5%）。阴茎龟头的腹侧大约是整个阴茎干长度的 12.5%（1/8 等分）（平均测量值为 12.6%；调查加权平均值为 11.7%）。
人类阴茎的测量比例符合精确分数。众包数据有助于支持摄影测量分析，调查中偏好的比例与测量比例相差 5%以内。随着进一步的验证，这些数据可以帮助进行阴茎成形术的外科医生。
