As multiple pilomatricomas with CTNNB1 mutations have been described in patients with PMS2 germline mutations, we analyzed the stability of microsatellite DNAs BAT25, BAT26, D2S123, D5S354 and D17S250 in two pilomatricomas of the patient (G34dup, T41I) and in the pilomatrical carcinoma. Here, PMS2 is linked to pilomatrixoma.