A 65-year-old man presented 6 blue lesions located on his trunk. Dermoscopy revealed a blue structure-less pattern (homogeneous blue pattern).
This patient had been treated 10 years before for a leukaemia. These blue lesions with blue homogeneous patterns not well demarcated corresponded to radiotherapy tattoos.
This patient had been treated 10 years before for a leukaemia. These blue lesions with blue homogeneous patterns not well demarcated corresponded to radiotherapy tattoos.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrv2iE-xd_R_6WRRQJs7IqUUqzlKUJQ3l1DUicHJrFK-huuukb0RjPxxlBZVrZDzuCM3qDnlkQy35owixHxGt-iulTif8mcmieet9Gt0dUHf4vur8ccYWOLXGiVCwm69teMHm-HM7IF8A/s400/dermoscopy+280408+072.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFoiHxyUrlJE6HCe-85JIaawZDg6siEFws6j-ex6wEzRKE3srP_W3QycGx2jKF0nIg5lT-gI_L0WGEJJ9SWoJxIr7_zgvUgEuT4MgwPcID5GIgTcMBU7o0Jk3f7WSbYmpj7e6I64DhYeA/s400/dermoscopy+280408+071.jpg)
The main other cause of blue homogeneous pattern is blue nevus.
Here are above two examples of blue nevi.
Here are above two examples of blue nevi.