“…Almost all of them coincide in that a specific cytological diagnosis is challenging. The first report was published in 1982, and since then at least 23 articles including 40 patients have followed [ 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 ]. Thirty-two correspond to the HV type; six to the PC variant, and two are mixed or not specified.…”