Inverted follicular keratoses are acrotrichomas.

@article{Mascar1983InvertedFK,
  title={Inverted follicular keratoses are acrotrichomas.},
  author={Jos{\'e} Manuel Mascar{\'o}},
  journal={The American Journal of dermatopathology},
  year={1983},
  volume={5 5},
  pages={447-51}
}