Cytohistologic findings with CT-guided FNA
| Cytologic Diagnosis | No. of Lesions |
|---|---|
| Malignant neoplasm | |
| Squamous cell carcinoma | 24 |
| Adenocarcinoma | 4 |
| Papillary carcinoma | 6 |
| Follicular neoplasm | 4 |
| Acinic cell carcinoma | 3 |
| Adenoid cystic carcinoma | 1 |
| Mucoepidermoid carcinoma* | 3 |
| Lymphoma | 1 |
| Melanoma | 2 |
| Chordoma | 2 |
| Metastatic disease† | 4 |
| Myeloma | 1 |
| Neuroendocrine tumor | 1 |
| Spindle cell malignancy | 3 |
| Synovial sarcoma | 1 |
| Low-grade sarcoma | 1 |
| Posttransplant lymphoproliferative disorder | 1 |
| Undifferentiated carcinoma | 4 |
| Vasoformative neoplasm | 1 |
| Benign neoplasm | |
| Multinodular goiter | 21 |
| Cyst‡ | 10 |
| Follicular adenoma | 2 |
| Pleomorphic adenoma§ | 14 |
| Monomorphic adenoma | 1 |
| Warthin tumor | 3 |
| Lipoma | 2 |
| Hurthle cell tumor | 3 |
| Paraganglioma | 3 |
| Giant cell tumor | 1 |
| Granulation tissue | 2 |
| Reactive lymph node | 7 |
| No evidence of neoplasm‖ | 44 |
| Infection | 8 |
| Inflammation | 7 |
| Nondiagnostic study | 21 |
* One wrong diagnosis (abscess).
† Renal cell, breast, or prostate carcinoma.
‡ Colloid, hemorrhagic, or branchial cleft cyst.
§ One wrong diagnosis (mucoepidermoid carcinoma).
‖ Radiation change or fibrous, glandular, adipose, or muscular tissue with no tumor cells. Two wrong diagnoses (squamous cell carcinoma, schwannoma).