Dermatology IM: Benign Skin Tumors

Study Notes

Seborrheic Keratosis

Characterized by multiple, oval, slightly raised, light brown to black papules or plaques.
Typically measures less than 3 cm in diameter and is covered with a crust.
Scraping the surface leaves a moist base, indicating a crumbly texture.
Common locations include the chest, back, scalp, feet, neck, extremities, and genital area.
Onset usually occurs between ages 10-50, with increased prevalence during pregnancy and weight gain.
Often associated with a higher occurrence in individuals with colonic polyps.

Acrochordon (Skin Tags)

Known as "kuntil" in Tagalog, and referred to as "skin tags" in English.
Small, flesh-colored to dark-brown growths, can be pinhead-sized or larger, with sessile and pedunculated forms.
Commonly found on the neck, axilla, eyelids, trunk, and groin; often hang from thin stalks.
Number of acrochordons increases with weight gain and during pregnancy.
Have a potential association with colonic polyps.

Treatment of Acrochordon

Electrocautery is common, involving anesthetic application, cutting the stalk, and cauterization of the base.

Dermatofibroma

Usually appears as a single, round or ovoid papule or nodule measuring about 1 cm in diameter.
Displays a reddish-brown or yellowish hue and adheres to the epidermis, typically causing a dell-like depression.
Dimple sign observed when grasping gently between thumb and forefinger, creating a visible depression.
Commonly occurs in individuals in their 4th to 5th decade of life.
May arise from a local arrest in keratinocyte maturation, with origins often being de novo or from lentigines.

Additional Facts on Dermatofibroma and Seborrheic Keratosis

Itching can be a symptom associated with dermatofibroma.
Lentigines start as hyperpigmented patches, potentially evolving into seborrheic keratosis with a crusty surface.
Sudden eruptions of seborrheic keratosis can indicate inflammatory cutaneous disorders, such as exfoliative dermatitis.
Common sites for dermatofibromas include the lower extremities, above the elbow, and sides of the trunk.
Rare instances of squamous cell carcinoma (SCC) and basal cell carcinoma (BCC) may emerge from seborrheic keratosis.

Description

This quiz covers essential knowledge on benign skin tumors, focusing on conditions such as Seborrheic Keratosis and Acrochordon (skin tags). Learn about their characteristics, terminology, and presentation in dermatology. Ideal for medical students and professionals seeking to enhance their understanding of dermatological conditions.