Brief Answer:
Keratosis

Detailed Answer:
Thanks for asking on HealthcareMagic.

I have gone through your query carefully and understand your concerns.

The biopsy reveals a keratotic lesion. The skin and hair contain a substance called keratin. When keratin is excessively deposited somewhere, the phenomenon is known as keratosis. That is what happened at the tip of your nose. It is sometimes observed although it is not very common.

Let me know if I could help further.

Regards

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Brief Answer:
Frequency mentioned

Detailed Answer:
Approximately 5% of women ages 20–29 develop actinic keratosis (AK) compared to 68% of women ages 60–69, and 10% of men ages 20–29 develop AK compared to 79% of men ages 60–69 years.

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Brief Answer:
Recurrence can occur.

Detailed Answer:
Actinic keratoses follow one of three paths: they can either persist as AKs, regress, or progress to invasive skin cancer, as AK lesions are considered to be on the same continuum with squamous cell carcinoma (SCC). AK lesions that regress also have the potential to recur.

* Progression: The overall risk of an AK turning into invasive cancer is low. In average-risk individuals, likelihood of an AK lesion progressing to SCC is less than 1% per year. Despite this low rate of progression, studies suggest that a full 60% of SCCs arise from pre-existing AKs, reinforcing the idea that these lesions are closely related.
* Regression: Reported regression rates for single AK lesions have ranged between 15–63% after one year.
* Recurrence: Recurrence rates after 1 year for single AK lesions that have regressed range between 15–53%.

The calculated lifetime risk of malignant transformation for a patient with AKs followed up for 10 years is between 6.1% and 10.2%

I hope that the above information would help.

Regards

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