feline neoplasm feline progressive histiocytosis https://github.com/monarch-initiative/mondo/issues/5252 MONDO:0700187 A condition occurring in cats characterized by solitary or multiple cutaneous nodules and papules, which may metastasize late in the course of the disease. Lesions consist of poorly circumscribed histiocytic infiltrates of the superficial and deep dermis, with variable extension into the subcutis. NCIT:C176702