From OMIM
Carney complex is an autosomal dominant multiple neoplasia syndrome characterized by cardiac, endocrine, cutaneous, and neural myxomatous tumors, as well as a variety of pigmented lesions of the skin and mucosae. Carney complex may simultaneously involve multiple endocrine glands, similar to classic MEN syndromes (MEN1; 131100 and MEN2; 171400). Carney complex shows some similarities to McCune-Albright syndrome (MAS; 174800), a sporadic condition that is also characterized by multiple endocrine and nonendocrine tumors, and shares skin abnormalities and some nonendocrine tumors with the lentiginoses and certain of the hamartomatoses, particularly Peutz-Jeghers syndrome (PJS; 175200). Carney complex is often associated with the unusual large-cell calcifying Sertoli cell tumor and psammomatous melanotic schwannomas (Kirschner et al., 2000; Stratakis et al., 2001). Genetic Heterogeneity of Carney Complex Carney complex type 2 (CNC2; 605244) has been mapped to chromosome 2p16, indicating genetic heterogeneity. See also isolated primary pigmented nodular adrenocortical disease (PPNAD1; 610489) and isolated cardiac myxoma (255960), both of which are manifestations of the Carney complex that can be seen in isolation. A family with features of the Carney complex and distal arthrogryposis (608837) associated with a mutation in the MYH8 gene (160741) has also been reported.  http://www.omim.org/entry/160980

From MedlinePlus Genetics
Carney complex is a disorder characterized by an increased risk of several types of tumors. Affected individuals also usually have changes in skin coloring (pigmentation). Signs and symptoms of this condition commonly begin in the teens or early adulthood.

Individuals with Carney complex are at increased risk of developing noncancerous (benign) tumors called myxomas in the heart (cardiac myxoma) and other parts of the body. Cardiac myxomas may be found in any of the four chambers of the heart and can develop in more than one chamber. These tumors can block the flow of blood through the heart, causing serious complications or sudden death. Myxomas may also develop on the skin and in internal organs. Skin myxomas appear as small bumps on the surface of the skin or as lumps underneath the skin. In Carney complex, myxomas have a tendency to recur after they are removed.

People with Carney complex may also develop tumors of other endocrine tissues, including the thyroid, testes, and ovaries. A tumor called an adenoma may form in the pituitary gland, which is located at the base of the brain. A pituitary adenoma usually results in the production of too much growth hormone. Excess growth hormone leads to acromegaly, a condition characterized by large hands and feet, arthritis, and "coarse" facial features.

Individuals with Carney complex also develop tumors in hormone-producing (endocrine) glands, such as the adrenal glands located on top of each kidney. People with this condition may develop a specific type of adrenal disease called primary pigmented nodular adrenocortical disease (PPNAD). PPNAD causes the adrenal glands to produce an excess of the hormone cortisol. High levels of cortisol (hypercortisolism) can lead to the development of Cushing syndrome. This syndrome causes weight gain in the face and upper body, slowed growth in children, fragile skin, fatigue, and other health problems.

Almost all people with Carney complex have areas of unusual skin pigmentation. Brown skin spots called lentigines may appear anywhere on the body but tend to occur around the lips, eyes, or genitalia. In addition, some affected individuals have at least one blue-black mole called a blue nevus.

Some people with Carney complex develop a rare tumor called psammomatous melanotic schwannoma. This tumor occurs in specialized cells called Schwann cells, which wrap around and insulate nerves. This tumor is usually benign, but in some cases it can become cancerous (malignant).  https://medlineplus.gov/genetics/condition/carney-complex