In our innovation-driven world we tend to lay concepts that have lost their attractiveness to rest and rush to embrace the next giant leap. However, in most fields of creation, patterns of reawakening of old, extinct innovations can be found. It often looks as if new technological and social concepts have a life of their own, survival instincts and adaptive properties: They simply refuse to die...

Reactivation of pre-existing scars, as a manifestation of cutaneous sarcoidosis, is uncommon and the clinical significance of this odd symptom often remains unrecognised. In the appropriate setting a skin biopsy may serve to establish the diagnosis of sarcoidosis and avoid more invasive attempts at obtaining tissue. The case of a 72 year old man with remote reactivation of multiple cutaneous sc...

We thank Alffenaar and colleagues on their very insightful comments regarding the new breakpoints for multidrugresistant tuberculosis (MDR TB) (1). We agree that the impact of the definition goes beyond statistical increases in the prevalence of MDR TB and has a direct impact on who should be treated with first-line regimens. Revision of breakpoints implies changing the regimens on which patien...