melanoma

A dark-pigmented, usually malignant tumor arising from a melanocyte and occurring most commonly in the skin.

A dark-pigmented tumor.

A tumor containing dark pigment. Such tumors are usually malignant and often fatal.

Development of dark-pigmented tumors.

A dark–pigmented, usually malignant tumor arising from a melanocyte and occurring most commonly in the skin.

any of several malignant neoplasms (usually of the skin) consisting of melanocytes