In a 54-year-old woman, on the face (persistence of lesion after topical TCA)
What to see at dermoscopy:
-irregular annular-granular pattern [pseudonetwork] (circle)
-strawberry appearence
Although Dermoscopy was in favor of actinic keratosis biopsy over the pigmented site was indicated. Irregular annular-pattern should raise the suspicion of lentigo maligna
In a 62-year-old woman, on the eyebrow
What to see at dermoscopy:
-pseudonetwork
-strawberry appearance
-rosette sign (circle)
Dermoscopy in favor of actinic keratosis
Comment: rosette sign is a new dermoscopic pattern where 4 white points are arranged as a 4-leaf clover inside the follicular openings.
For more information read: Cuellar F.et al “New dermoscopic pattern in actinic Keratosis and related conditions”. Arch Dermatol 2009; 145: 732
In a 63-year-old man, on the scalp
What to see at dermoscopy:
-strawberry appearance
-annular-granular pattern
-hyperkeratosis at the low portion of lesion
-incontinentia pigmenti
Dermoscopy in favor of pigmented actinic keratosis
Comment: biopsy was suggested to rule out a squamous cell carcinoma
In a 56-year-old woman, on the nose
What to see at dermoscopy:
-pseudonetwork
-irregular pigmentation around follicular opening (circle)
-erythema
-finguerprint-like structures
-moth-eaten border
Biopsy at the irregular pigmentation (circle area) was indicated to rule out a lentigo melanoma
Histology correlation: actinic keratosis
Comment: the finding of finguerprint-like structures and the moth-eaten border indicates the possibility of coexistence of a solar lentigo beside the actinic keratosis.
In a 73-year-old woman, on the leg
What to see at dermoscopy:
-cerebriform pattern
-fissures and ridges
-sharp borders
-scar-like depigmentation (lower portion of lesion)
-scaly surface at the lower portion of lesion
Although dermoscopy is in favor of seborrheic keratoses, biopsy at the lower portion of lesion was indicated to rule out a squamous cell carcinoma.
Hitopathology correlation: actinic keratoses.