How often do you pursue malignant transformation screening In patients with lymphomatoid papulosis or pityriasis lichenoides?  

In the case of patients with lymphomatoid papulosis (LyP) or pityriasis lichenoides, regular follow-up and monitoring for signs of malignant transformation is important, given the potential (though generally low) risk of progression to lymphoma, especially cutaneous T-cell lymphoma. For LyP, follow...