Causes of a goiter include an imbalance in the thyroid gland and Goiter symptoms generally occur in a gland that is overactive, producing too much hormone (hyperthyroidism), or that is underactive, producing too little hormone (hypothyroidism).
ICD-9 170.3 is malignant neoplasm of ribs, sternum, and clavicle (1703). This code is grouped under diagnosis codes for neoplasms.
Schwannoma, malignant: Introduction. Schwannoma, malignant: A malignant tumor that develops from nerve sheath cells. Any nerve can be affected but it is most common on the sciatic, brachial and sacral plexus (leg, upper arm and lower back nerves). Symptoms are determined by the exact location of the tumor. More detailed information about the symptoms, causes, and treatments of Schwannoma, malignant is available below.