PNI

(redirected from Perineural Invasion)
Also found in: Medical.
AcronymDefinition
PNIPsychoneuroimmunology
PNIPositivo, Negativo, Interesante (Spanish: Positive, Negative, Interesting)
PNIPrinceton Neuroscience Institute (Princeton University; Princeton, NJ)
PNIPrescott New Instructions
PNIPhysical Network Inventory (various companies)
PNIProducción Nacional Independiente (Venezuela)
PNIPacific Neuropsychiatric Institute (Seattle, Washington)
PNIPerineural Invasion
PNIProgressive Networks, Inc.
PNIPharmaceutical News Index
PNIPalestinian National Initiative
PNIPorter Novelli International (public relations; various locations)
PNIPohnpei, Caroline Islands, Micronesia - Pohnpei International (Airport Code)
PNIPacific Nanotechnology, Inc. (Santa Clara, CA)
PNIPrescott New Instruction (Intel chips; early codename)
PNIPartido Nacional Independiente (National Independent Party, Costa Rica)
PNIPro Natura International (Paris, France)
PNIPaid/No Issue (banking term)
PNIProductivity Network, Inc.
PNIParanormal Ideation
PNIPacific Neurosciences Institute
References in periodicals archive ?
Also, SCC frequently invades subcutaneous tissue and shows presence of lymphovascular and perineural invasion.
HPE showed a well differentiated carcinoid tumour of size 1 * 1 * 1 cm in duodenum with pancreatic head infiltration, no lymphovascular or perineural invasion, 1 out of 3 lymph nodes involved, surgical margins uninvolved.
Brandwein-Gensler et al (6) found that perineural invasion (PNI) of small and large nerves was associated with reduced overall survival, and PNI of large nerves was specifically associated with local recurrence.
Well 32 (80) 6 (24) Moderately 6 (15) 8 (32) Poorly 1 (2) 10 (40) Otherb 1 (2) 1 (4) Perineural invasion, No.
2-10) Perineural invasion is generally absent; it was noted in only 2 cases (3, 10) other than our own.
Perineural invasion positivity was closely associated with tumor size, differentiation, Lauren classification, depth of tumor invasion, lymph node metastasis, clinical stage, and tumor recurrence.
Criteria for assessing malignancy include overt nuclear atypia, readily observed mitotic figures, infiltrative patterns, lymphatic or perineural invasion and areas of necrosis.
Clinicopathologic parameters, including patient age, sex, tumor site, histologic pattern, perineural invasion, surgical margin status, TNM stage at the time of surgery, and follow-up information, such as the presence of recurrence and distant metastasis, were obtained from pathologic reports and medical records.
There was a trend toward greater locoregional recurrence in patients who had perineural invasion, but the association did not reach the threshold for statistical significance; the locoregional recurrence rates in patients with and without perineural invasion were 67% (4 of 6 patients) and 19% (3 of 16), respectively.
The effects of diagnosis and tumor grade, tumor extent, and perineural invasion in cancer cases were also analyzed in this study.
Perineural invasion is almost always diagnostic of parathyroid carcinoma (figure 1, B).
28 Location Upper/middle 219 143 55 Lower 193 120 46 Invasion depth M, SM 223 157 44 MP, SS, SE 189 106 57 Gross type Elevated/flat/ 283 189 65 depressed Excavated 129 74 36 Histologic type Intestinal + 251 147 71 mixed Diffuse 161 116 30 Perineural invasion Negative 278 182 65 Positive 134 81 36 Lymphovascular emboli Negative 259 183 53 Positive 153 80 49 Lymph node metastasis (a) Negative 244 164 57 Positive 168 99 44 Mucin Phenotypes Null P Age y 60.