The objective of the present invention is to provide a pharmaceutical composition and a therapeutic method that are specifically effective against at least one disease selected from the group consisting of multiple endocrine neoplasia, type IIA, multiple endocrine neoplasia, type IIB, familial medullary thyroid carcinoma, thyroid carcinoma, papillary thyroid carcinoma, sporadic medullary thyroid carcinoma, Hirschsprung disease, pheochromocytoma, parathyroid hyperplasia and mucosal neuromas of the gastrointestinal tract.4-(3-chloro-4-(cyclopropylaminocarbonyl)aminophenoxy)-7-methoxy-6-quinoli necarboxamide and analogs thereof are specifically effective against at least one disease selected from the group consisting of multiple endocrine neoplasia, type IIA, multiple endocrine neoplasia, type IIB, familial medullary thyroid carcinoma, thyroid carcinoma, papillary thyroid carcinoma, sporadic medullary thyroid carcinoma, Hirschsprung disease, pheochromocytoma, parathyroid hyperplasia and mucosal neuromas of the gastrointestinal tract.
