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Dilated Pore of Winer

Last updated March 23, 2018

LWozniak&KWZielinski

Microscopic pathology image showing Dilated Pore of Winer.


What are the other Names for this Condition? (Also known as/Synonyms)

  • Giant Blackhead
  • Winer’s Pore

What is Dilated Pore of Winer? (Definition/Background Information)

  • Dilated Pore of Winer is a common, benign, and slightly raised nodule that is actually a dilated hair follicle
  • It is generally observed in middle-aged and older individuals. This solitary tumor resembles a “Giant Blackhead” and is cosmetically unappealing. It usually appears on the face
  • The cause of development of the condition is unknown, though the risk factors for Dilated Pore of Winer include exposure to sun and cystic acne
  • A treatment of Dilated Pore of Winer may be undertaken, if they present cosmetic concerns to the individual. In such cases, a surgical excision is sufficient treatment. The prognosis is excellent on removal of the tumor

Who gets Dilated Pore of Winer? (Age and Sex Distribution)

  • Dilated Pore of Winer is commonly seen in middle-aged adults; the incidence increases with age
  • It is observed in both men and women, but the condition is more common in men
  • This condition is observed worldwide across all racial and ethnic groups

What are the Risk Factors for Dilated Pore of Winer? (Predisposing Factors)

The risk factors for Dilated Pore of Winer include:

  • Exposure to sunlight and UV light causing skin damage
  • Skin tanning (use of tanning beds)
  • Cystic acne

It is important to note that having a risk factor does not mean that one will get the condition. A risk factor increases ones chances of getting a condition compared to an individual without the risk factors. Some risk factors are more important than others.

Also, not having a risk factor does not mean that an individual will not get the condition. It is always important to discuss the effect of risk factors with your healthcare provider.

What are the Causes of Dilated Pore of Winer? (Etiology)

The exact cause and development of Dilated Pore of Winer is unknown.

What are the Signs and Symptoms of Dilated Pore of Winer?

Dilated Pore of Winer may not present any signs and symptoms. However, the following may be noted:

  • They occur as single, raised nodule with a black or brown tip, which may occur anywhere in the body. However, it is frequently found on the face, forehead, neck, back, or chest (sun-exposed areas)
  • They are slow-growing tumors and may range in size from a few millimeters to a few centimeters
  • They may ooze pus from the center of the nodule if squeezed
  • The nodules are benign and no malignancy occurs in them
  • Dilated Pore of Winer is not associated with itching or inflammation

How is Dilated Pore of Winer Diagnosed?

A diagnosis of Dilated Pore of Winer may involve the following procedures and tests:

  • Complete physical examination with evaluation of medical history
  • Dermoscopy: It is a diagnostic tool where a dermatologist examines the skin using a special magnified lens
  • Wood’s lamp examination: In this procedure, the healthcare provider examines the skin using ultraviolet light. It is performed to examine the change in skin pigmentation
  • Skin biopsy: A skin biopsy is performed and sent to a laboratory for a pathological examination. The pathologist examines the biopsy under a microscope. After putting together clinical findings, special studies on tissues (if needed) and with microscope findings, the pathologist arrives at a definitive diagnosis

Note: The diagnosis of Dilated Pore of Winer may not necessarily involve a biopsy. However, if there is a suspicion of melanoma, then the healthcare provider may recommend a biopsy.

Many clinical conditions may have similar signs and symptoms. Your healthcare provider may perform additional tests to rule out other clinical conditions to arrive at a definitive diagnosis.

What are the possible Complications of Dilated Pore of Winer?

No significant complications generally arise from Dilated Pore of Winer; however:

  • These raised growths may present cosmetic concerns since they are unsightly, in which case a surgery may be proposed
  • If they are traumatized, severe pain and bleeding with ulceration may occur
  • Bleeding and ulceration can cause infection due to bacteria or fungi

How is Dilated Pore of Winer Treated?

Dilated Pore of Winer may not require any treatment in a majority of cases. However, they may be removed when they present cosmetic issues or get infected.

  • The healthcare provider may chose to regularly monitor the tumor, if they are asymptomatic. A ‘wait and watch’ approach may be adopted
  • A complete surgical excision can result in a cure
  • Follow-up care with regular screening and check-ups are important

How can Dilated Pore of Winer be Prevented?

  • Current medical research has not established a definitive way to prevent the formation of Dilated Pore of Winer
  • However, avoiding overexposure to sun’s rays and UV light can help protect the skin and reduce the risk for the condition

What is the Prognosis of Dilated Pore of Winer? (Outcomes/Resolutions)

  • The prognosis of Dilated Pore of Winer is excellent on its complete excision and removal
  • Since, these are benign tumors, the prognosis is excellent, even if no treatment is provided and only periodic observation is maintained

Additional and Relevant Useful Information for Dilated Pore of Winer:

  • Dilated Pore of Winer is not an infectious condition; they do not spread from one individual to another
  • There is no definitive proof that consuming certain foods influence its development

What are some Useful Resources for Additional Information?


References and Information Sources used for the Article:


Helpful Peer-Reviewed Medical Articles:


Reviewed and Approved by a member of the DoveMed Editorial Board
First uploaded: Nov. 26, 2015
Last updated: March 23, 2018

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