benign metastasis

(redirected from lymph node inclusion)

benign metastasis

A popular term for the presence of nonmalignant nonlymphoid tissue in lymph nodes which can lead to falsely describing, especially if found during a frozen section, the extraneous tissue malignant.
 
Examples
Salivary duct, thyroid follicles, müllerian epithelium, decidua endometriosis, nevus cells, colonic glands, breast tissue, megakaryocytes, adipose tissue, ectopic thymus, hyaline and proteinaceous material. (Technically these benign tissues are not metastatic, as metastasis is a multistep malignant process.)

benign 'metastasis'

A popular term for the presence of nonmalignant nonlymphoid tissue in lymph nodes–eg, thyroid follicles in cervical lymph nodes, which may be confused with carcinoma. See Lymph node inclusions.
References in periodicals archive ?
Lymph node inclusions of paramesonephricus type are found almost exclusively in pelvic lymph nodes.
Lymph node inclusions of breast tissue are predominantly composed of ectopic mammary glands and ducts with diverse morphological characteristics.
Mesothelial lymph node inclusions preferentially appear in the mediastinal lymph nodes of patients who are affected by pleural or pericardial effusions (Rutty; Paull & Mosunjac, 2003).
1974) reported that, among 22 cases of melanocytic lymph node inclusions, 21 presented nevi in the skin.
Lymph node inclusions of epithelial and nevomelanocytic types are predominant in axillary lymph nodes (Fisher et al.

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