Case 8 Malignant melanoma Gross Nodular, blue-black tumor with asymmetry, irregular border, variegation in color, and diameter greater than 6mm. Case 8 Malignant melanoma LP Tumor cells extend from epidermis to invade the dermis. Note brown melanin pigment in tumor cells. HP Pagetoid spread of tumor cells through epidermis. There is also dermal invasion.
Some tumor cells contain brown melanin pigment.
Gross Freely movable dermal subcutaneous nodule. Cut section reveals a white, cheesy and malodorous cyst contents. Case 11 Dermatofibroma Gross Frim nodule which is brown or flesh-colored and dimples with central compression. The overlying epidermis is acanthotic and hyperpigmented along the basal layer. Fibrosis is increased in the dermis.