Leukemia cutis is the infiltration of neoplastic leukocytes or their precursors into the skin

Skin

-Dermis:The dermis is the layer of skin beneath the epidermis that consists of connective tissue and cushions the body from stress and strain. The dermis is tightly connected to the epidermis by a basement membrane. It also harbors many Mechanoreceptors that provide the sense of touch and heat...

 resulting in clinically identifiable cutaneous lesions. This condition may be contrasted with leukemids

Leukemids

Leukemids are nonspecific skin lesions that occur with leukemia which are not related to leukemic cell infiltration...

, which are skin lesions that occur with leukemia, but which are not related to leukemic cell infiltration.
Leukemia cutis can occur in most forms of leukemia,including chronic myeloid leukemia, acute lymphoblastic leukemia

Acute lymphoblastic leukemia

Acute lymphoblastic leukemia is a form of leukemia, or cancer of the white blood cells characterized by excess lymphoblasts.Malignant, immature white blood cells continuously multiply and are overproduced in the bone marrow. ALL causes damage and death by crowding out normal cells in the bone...

, chronic lymphocytic leukemia

Chronic lymphocytic leukemia

B-cell chronic lymphocytic leukemia , also known as chronic lymphoid leukemia , is the most common type of leukemia. Leukemias are cancers of the white blood cells . CLL affects B cell lymphocytes. B cells originate in the bone marrow, develop in the lymph nodes, and normally fight infection by...

, acute myeloid leukemia

Acute myeloid leukemia

Acute myeloid leukemia , also known as acute myelogenous leukemia, is a cancer of the myeloid line of blood cells, characterized by the rapid growth of abnormal white blood cells that accumulate in the bone marrow and interfere with the production of normal blood cells. AML is the most common acute...

, and prolymphocytic leukemia

Prolymphocytic leukemia

Prolymphocytic leukemia is divided into two types according the kind of cell involved: B-cell prolymphocytic leukemia and T-cell prolymphocytic leukemia. It is usually classified as a kind of chronic lymphocytic leukemia....

.