Rishi Agrawal @rishiagrawal.bsky.social · 21/02/2026Given it's derived from the ORS, do they stain positive for cd34 and calretinin? Or is that only for ORS tumours derived from below the isthmus, i.e. trichilemmomas? 100 0
Richard Carr @racarr51.bsky.social · 21/02/2026Checked database only ~5 cases only. None wiht IHC. Expect CD34 negative usually a feature of mid-stem/lower outer ORS as in tricholemmoma although does stains about 50% of proliferating pilar tumours. Calretinin definitely. But it would be academic. 100 0
Rishi Agrawal @rishiagrawal.bsky.social · 21/02/2026Calretinin definitely positive or definitely negative in a TFI? 100 0
