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1. Pathol any substance that passes into and accumulates within cells, tissues, or organs
2. Pathol a local anaesthetic solution injected into the tissues to cause local anaesthesia



an accumulation in bodily tissues of cellular elements admixed with blood and lymph. Inflammatory and tumorous infiltrates occur most often.

An inflammatory infiltrate consists chiefly of polymorphonuclear leukocytes (suppurative infiltrate), erythrocytes (hemorrhagic infiltrate), lymphoid cells (round cell infiltrate), and histiocytes and plasma cells (histiocyte-plasma cell infiltrate). These infiltrates may be resolved, may liquefy, or may undergo sclerosis and form caverns, abscesses, scars, and so forth.

A tumorous infiltrate consists of tumor cells of different kinds (carcinoma, sarcoma); it is a manifestation of the infiltrating growth of a tumor. When an infiltrate forms, the tissue enlarges, changes color, and becomes harder and sometimes painful. In surgical practice, an infiltrate is an induration that develops in tissues when they become saturated with an anesthetic.


References in periodicals archive ?
Usually there is one infiltrate which can be larger than 2mm, it may also have irregular edges and a ring infiltrate around it.
Prostatic tissue infiltrated by an atypical lymphoid infiltrate positive for CD5 (weak), Kappa light chain and cycline D1.
The mixed inflammatory infiltrate (some lymphocytes, histiocytes, and plasma cells) in these areas was predominated by eosinophils.
On the endobronchial biopsies taken 2 1/2 months after lung transplantation, hematoxylin-eosin-stained sections revealed a diffuse dense infiltrate of polymorphic lymphoid cells involving the bronchial lamina propria under a focally ulcerated bronchial epithelium.
Therefore, it is necessary to either eliminate the air from the porosity or allow enough time for infiltration so that the binder can sufficiently infiltrate.
With AppSense's proactive approach to security, spyware and malware--whether known or unknown to traditional security solutions--simply cannot infiltrate our servers and impact our users.
The terrorists who infiltrate are given shelter by him and he gives instructions to them on how and where to strike," said an intelligence official.
TEHRAN (FNA)- The Syrian army thwarted repeated attempts by anti-government groups to infiltrate into its strongholds in Dar countryside, killing and wounding many rebels in the battlefields.
Amman, Mar 16 (Petra) aAC"aAC" Border guards shot at and arrested four men when they tried to infiltrate the frontier from the Syrian side in the latest attempt to breach the Kingdom's borders, a source at the Jordan armed forces General Command Headquarters said on Sunday.
Spooks adopted geeky avatars to infiltrate Xbox Live and World of Warcraft communities, fearing al-Qaeda cells used their messaging functions to plot atrocities.
ISTANBUL, May 4 (KUNA) -- Turkish security authorities arrested 14 illegal Syrian immigrants west of Turkey for attempting to infiltrate to Europe, in a new wave of illegal immigration witnessed in the nation, Turkish General Staff (TAF) said on Saturday.
Two persons were trying to infiltrate crossing international border.