A male patient in his early twenties presented with this hand lesion since 3 months and the neck lesion since 4 years. What is your diagnosis?

Bell Eapen
AI, machine learning & digital health consultant at SkinHelpDesk
Techie Dermatologist, Information Systems PhD, Supporter of Open-Source Software, Machine Learning and AI geek,loves cricket, Canadian wine and beer. [Resume]
Latest posts by Bell Eapen (see all)
- Skinmesh: Machine learning for facial analysis - November 10, 2020
- Free Dermatology EMR for Machine Learning and Artificial Intelligence - January 2, 2020
- Does your dermatology practice website talk to your patients? - September 1, 2016
Because of the underlying atrophy and loss of substance on palpation over the neck lesion I thought of macular atrophy or primary anetoderma. But a herniated saclike appearence was absent.
Is the hand lesion the inflammatory (Jadassohn Pellizzari)type and the neck lesion the noninflammatory (Schweninger-Buzzi) type? Some consider both forms, two phases of same disease.
The patient was otherwise normal.