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TABLE 1: Final diagnoses of 53 parotid lesions, patients undergoing surgery, needle sizes, passes, and volume of acquired tissue
Pathologic Diagnosis Patient Age (y) M:F Ratio Total Cases Surgical Cases Needle Gauge Passes Tissue Volume (mm³)^*
Benign neoplasm 17–72 22:11 33 15 14–18 1–4 18–128
    Pleomorphic adenoma 17–54 8:7 15 11 16–18 2–4 36–128
    Warthin tumor^† 34–72 12:3 15 12 14–18 1–3 18–105
    Oncocytoma 58, 62 1:1 2 1 16 2 64
    Neurilemmoma 56 1:0 1 1 16 2 64
Malignant neoplasm 38–81 10:3 13 6 14–20 2–5 36–262
    Lymphoma 38–74 3:3 6 1 14–20 2–5 36–262
    Primary carcinoma^‡ 40–81 4:0 4 4 14–18 2–3 55–157
    Metastatic carcinoma 40, 57 2:0 2 0 16, 18 2, 3 55, 64
    Organized abscess, clear cell carcinoma^§ 65 1:0 1 1 16 3 96
Nonneoplastic lesion 31–70 3:4 7 0 14–18 2–4 36–128
    Sclerosing sialoadenitis 61, 70 0:2 2 0 16 2, 3 64, 96
    Chronic inflammation 55–69 1:2 3 0 16, 18 2–4 36–128
    Postoperative fibrosis 31 1:0 1 0 14 2 105
    Lymphoid hyperplasia 34 1:0 1 0 18 3 55
Total 17–81 35:18 53 31 14–20 1–5 18–262
* Approximate volume = 3.14 × radius × radius × length of specimen notch or throw × number of passes.
† Of 53 cases, only one Warthin tumor was associated with hematoma.
‡ Including adenoid cystic, lymphoepithelioma–like, mucoepidermoid, and squamous cell carcinomas (one each).
§ Pathologic diagnoses were concordant between biopsy and surgery in all patients except this one. Clear cell carcinoma was found on surgicopathology.