Definition

  • Rare multiple neoplasia syndrome associated with distinctive cutaneous lesions
  • Inactivating mutations in the protein kinase A type I-alpha regulatory subunit (PRKAR1A) gene
  • AD
  • Previously called NAME (nevi, atrial myxoma, ephelides) and LAMB (lentigines, atrial myxoma, blue nеvi) syndrome.

Clinical

Cutaneous

  • Lentiginous skin pigmentation - 70 to 80 percent of patients. O
    • Often have a periorificial distribution and may be found on the lid margin and lacrimal caruncle.
  • Dark “ink spot” lentigines
  • Multiple blue nеvi
  • Cutaneous myxomas.
    • Benign dermal tumors presenting as sharply demarcated subcutaneous nodules, a few millimeters to 1.5 cm in diameter

Extracutaneous

  • Primary pigmented nodular adrenocortical disease (ΡPΝAD)
  • Testicular large cell calcifying Sertoli tumors
  • Pituitary adenomas
  • Thyroid adenomas and carcinomas
  • Ovarian cysts.
  • Cardiac myxomas
  • psammomatous melanotic schwannomas
  • Breast ductal adenomas
  • Osteochondromyxomas