Epidermal cyst - 表皮囊肿https://en.wikipedia.org/wiki/Epidermoid_cyst
表皮囊肿 (Epidermal cyst) 是皮肤上最常见的良性囊肿。表皮囊肿 (epidermal cyst) 可能没有任何症状,触摸时也可能会疼痛。它可能会释放浸渍的角蛋白。

表皮囊肿 (epidermal cyst) 约占所有切除囊肿的85%–95%,恶性转变极为罕见。可以通过手术切除。

治疗
手术切除——即使不断挤压囊内内容物,囊肿仍可能复发。因此常需手术切除。疼痛性病变和疑似感染应使用抗生素治疗。

治疗 – 非处方药
频繁触摸受影响的区域可能导致发炎。大多数大于 1 厘米的发炎病变通常需要在医院进行手术治疗。如果小病变发炎,可尝试使用非处方抗生素。不要使用类固醇软膏治疗表皮囊肿。
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  • 如果通常持续存在的小肿块突然发炎,则可能怀疑为表皮囊肿。
  • 这种情况很难与普通脓肿区分开来。
  • 表皮囊肿的一个特征是有中央排出孔,例如在囊肿中心出现一个黑点。
  • 典型inflamed epidermal cyst——中心有一个黑色开口。
  • 它看起来像一个缓慢生长的老肿块,挤压时,角蛋白物质可能会释放出来。
  • 表皮囊肿 (Epidermal cyst) 是一个充满角蛋白的肿块。
  • 小病变可能看起来像脓肿,但与脓肿不同的是,表皮囊肿 (Epidermal cyst) 常常呈可触及的肿块。
  • Inflamed thyroglossal cyst
References Minimally Invasive Excision of Epidermal Cysts through a Small Hole Made by a CO2 Laser 24511501 
NIH
为了改善去除表皮囊肿后的外观,我们建议采用侵入性较小的技术。我们引入了一种新方法,可通过二氧化碳激光打出的微小孔洞彻底消除囊肿。我们治疗了25名直径为0.5至1.5厘米、未发炎且可自由活动的囊肿患者,所有患者对术后皮肤的外观均感到满意。这项技术操作简便,几乎不留下疤痕,且囊肿复发的可能性极低。
To improve the cosmetic results of removing epidermal cysts, minimally invasive methods have been proposed. We proposed a new minimally invasive method that completely removes a cyst through a small hole made by a CO2 laser. Twenty-five patients with epidermal cysts, which were 0.5 to 1.5 cm in diameter, non-inflamed, and freely movable, were treated. All of the patients were satisfied with the cosmetic results. This method is simple and results in minimal scarring and low recurrence rates without complications.
 Epidermal Inclusion Cyst 30335343 
NIH
Epidermal inclusion cysts 是最常见的皮肤囊肿类型,可出现在身体的任何部位。它们通常表现为皮肤表面下的软性肿块,中心常可见小孔或凹陷。这些囊肿可能引起疼痛,患者会感觉像皮下充满液体的软肿块。
Epidermal inclusion cysts are the most common cutaneous cysts and can occur anywhere on the body. These cysts typically present as fluctuant nodules under the surface of the skin, often with visible central puncta. These cysts often become painful to the patient and may present as a fluctuant filled nodule below the patient's skin.
 Epidermoid Cyst 29763149 
NIH
Epidermoid cysts 通常称为皮脂囊肿,它们是充满角蛋白的小结节,常见于面部、颈部和躯干的皮肤下。
Epidermoid cysts, also known as a sebaceous cysts, are encapsulated subepidermal nodules filled with keratin. Most commonly located on the face, neck, and trunk.
 Overview of epidermoid cyst 31516916 
NIH
在放射学检查中,它们呈圆形至椭圆形,轮廓清晰,无血管;restricted diffusion(受限扩散)常见。
On radiology, they have round to oval structure, well-circumscribed, avascular mass; restricted diffusion is typical.