Fig 1 Blotch
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXgRxRtC1zLSU1wReJqGpfV-W6mCp8oz3dVkaTeNFom3OwBACapuD-ms9J4gbLVyYUBguXFHngn8pty1ca0fzUuSOtv6Zmw3WrVigttN2BCTCVeLdKgF-noSq2AE5ZeKReF1cUGMrxobE/s400/blotch.jpg)
In our case, the blotch was symmetrically disposed and a peripheral reticular network was visible. This kind of blotch is also called black lamella.
This lesion was corresponding to a benign melanocytic nevus.
It has to be distinguished from the blue structure-less pattern or blue homogeneous pattern of a blue nevus (fig 2).
Fig 2 Blue homogeneous pattern
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEigdKRh7oi8oZ_jJDGukQ7N79voIjraC-Oju5DVreIOxkQiPKlqr1W-8WovmCwGmBc-feQK1im2cKPVcjKIFV_cMuqpesJiCT2D3NpODRSMQUoFaLb3EQTyB0Xcs421rD3x9Sp4DjP9ZRk/s400/dermoscopy+280408+040.jpg)