Case Number : Case 3068 - 11 April 2022 Posted By: Dr. Mona Abdel-Halim

Looks like annular lichen planus. However, I would do a PAS stain to rule out tinea incognito.

I don’t see any apoptotic bodies, or other aggressive autoimmune features of dermoepidermal interface. It seems a "passive epidermotropism”. Not sure, but I seem to see some nuclear atypia of lymphocytes. It needs to rule out a hypopigmented variant of MF, or am I wrong?

Annular lichenoid dermatitis of youth.

Agree with annular lichenoid dermatitis, action is primarily at the tips of rete, also location fits. Inflammatory vitiligo would be another possibility. Would like to see melanocytic marker (for retained melanocytes r/o vitiligo) and lymphocyte markers/TCR proving polyclonality. 

On 12/04/2022 at 20:12, Shawn said:

Agree with annular lichenoid dermatitis, action is primarily at the tips of rete, also location fits. Inflammatory vitiligo would be another possibility. Would like to see melanocytic marker (for retained melanocytes r/o vitiligo) and lymphocyte markers/TCR proving polyclonality. 

Concur

challinging case

The clinicopathological correlation and follow up of such cases is very important although your discription is in favour of inflammatory vitiligo, three zones of hypopigmentatiin, erythema and hyperpigmentation.

I would like to see the clinical picture of the patient, if possible.

Thanks for sharing.

annular lichenoid dermatosis of youth

You Guys are right. Age, 3 months duration and clinical features dont’t fit MF and fit instead ALD of youth, or Inflammatory Vitiligo. I didn’t know these lesions, before. Thanks for your comments.