Chronological changes in trichofolliculoma: Folliculosebaceous cystic hamartoma is not a very-late-stage trichofolliculoma.
- Noriyuki Misago,
- Shin-Ichi Ansai,
- Takaya Fukumoto,
- Takashi Anan,
- Tetsunori Kimura,
- Tomokazu Nakao
J Dermatol 2017 Mar 31. Epub 2017 Mar 31.
Division of Dermatology, Nakao Clinic, Saga, Japan.
Some authors have reported that the secondary hair follicles in trichofolliculomas (TF) undergo regressive changes and are subsequently replaced by the developed sebaceous elements, and that folliculosebaceous cystic hamartoma (FSCH) is a TF at a very late stage. In the present study, we revaluated the histopathological features of 40 TF lesions, focusing on their chronological changes. The results of the present study indicate that while the secondary follicles in the TF exhibited the hair cycle, the normal hair cycle was out of control, and tertiary hair follicles randomly developed from the involuting secondary follicles. Read More