Risk of hematologic and nonhematologic malignancies in MM and MGUS. Unspecified malignancies, unspecified acute leukemia, unspecified chronic leukemia, unspecified leukemia and monocytic leukemia, malignancies of the central and peripheral nervous system, conjunctiva, retina and ocular tumors, retroperitoneal, soft tissue and mediastinal tumors, and tumors with unknown primary are not included in the table due to small numbers. None of these tumor types was significantly associated with MM or MGUS, respectively. SIR indicates standardized incidence ratio; CI, confidence interval; gastrointestinal: esophagus, stomach, small intestine, colon, rectum, anal canal, liver and biliary system, and the pancreas; endocrine: parathyroid, thyroid, adrenals, hypophyses, carotid body, and islet cells; oral, nasal, and pharyngeal: lip, tongue, salivary glands, oral cavity, oropharynx, tonsils, nasopharynx, pyriform fossa, nasal cavity, paranasal sinuses, and the middle ear cavity; kidney and urinary tract: kidney, renal pelvis, ureter, urethra, and urinary bladder; respiratory: trachea, bronchi, lung parenchyma, and the pleura; female reproductive system: uterus, adnexa, cervix, placenta, vagina, vulva, and labia; and male reproductive system: prostate, testis, epididymis, and penis.