Thioflavine-T Reactivity in Calcifying Epithelioma of Malherbe

Localized Cutaneous Amyloidosis in Disseminated Superficial Actinic Porokeratosis

“…basal cell epithelioma (Hashimoto & Brown-stein 1973). calcifying epithelioma of Malherbc (Peterson 1968) and fibroepilhelioma of Pinkus (Siimegi 197.3). The deposition of amyloid in these disorders seemed to be dispersed about the bair follicles and involving many papillae.…”

Secondary localized cutaneous amyloidosis in melanocytic naevi

“…Deposits of amyloid are well known to localize around various neoplastic and degenerative skin lesions. This secondary localized cutaneous amyloidosis has been described in association with basal cell epithelioma (Sumegi, Goreczky & Roth, 1954;Malak & Smith, 1962;Brownstein & Helwig, 1970;Hashimoto & Brownstein, 1973;Weedon& Shand, 1979), fibroepithelioma of Pinkus (Sumegi, 1973), pilomatrixoma (Peterson, 1968), cylindroma (Freudenthal, 1930;Heyl, 1966), seborrhoeic keratosis (Malak & Smith, 1962), actinic keratosis (Hashimoto & King, 1973), Bowen's disease (Brownstein & Helwig, 1970), disseminated superficial actinic porokeratosis (Piamphongsant & Sittapaircachana, 1974) and odontogenic tumours (Meenaghan, Appel & Greene, 1972). Specific reports ofthe occurrence of amyloid within melanocytic naevi are lacking.…”

Secondary amyloid deposition in a melanocytic nevus

“…Secondary amyloid deposition is occasionally associated with both benign and malignant skin tumors, such as in seborrheic keratosis, calcifying epithelioma, solar keratosis, Bowen’s disease, basal cell carcinoma, and trichoepithelioma 1–6 . By contrast, amyloid deposition in association with melanocytic nevi is rare 7 .…”