2018
DOI: 10.2217/cns-2017-0022
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Intracranial meningioma with carcinoma tumor-to-tumor metastasis: two case reports

Abstract: Meningiomas have been implicated as the most common primary intracranial tumor to contain tumor-to-tumor metastasis. In the following two case reports, we describe cases of adenocarcinoma and breast carcinoma that metastasized into an intracranial meningioma. The first patient was a 64-year-old man presenting to the emergency department with seizures and loss of consciousness. After a left frontal mass resection, pathology reported a heterogeneous mass consisting of a meningioma and a metastatic adenocarcinoma… Show more

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Cited by 20 publications
(12 citation statements)
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“…Since then, many other tumor-derived factors, including cytokines, chemokines, extracellular matrix components, small noncoding RNAs and tumor-shed extracellular vesicles have been shown to act as systemic signals that trigger the formation of premetastastic niches in lung, liver or lymph nodes in different preclinical models (149,261). Clinical evidence for the existence of premetastatic tissues comes from patients with meningioma (a benign brain tumor) who later progress with tumor-to-meningioma metastasis of breast, lung or renal cancer (88,264,270). It is suggested that the presence of pro-inflammatory macrophages and the high microvascular density in meningioma contribute to metastasis formation (88).…”
Section: A Preparing the Soil -The Concept Of The Premetastatic Nichementioning
confidence: 99%
“…Since then, many other tumor-derived factors, including cytokines, chemokines, extracellular matrix components, small noncoding RNAs and tumor-shed extracellular vesicles have been shown to act as systemic signals that trigger the formation of premetastastic niches in lung, liver or lymph nodes in different preclinical models (149,261). Clinical evidence for the existence of premetastatic tissues comes from patients with meningioma (a benign brain tumor) who later progress with tumor-to-meningioma metastasis of breast, lung or renal cancer (88,264,270). It is suggested that the presence of pro-inflammatory macrophages and the high microvascular density in meningioma contribute to metastasis formation (88).…”
Section: A Preparing the Soil -The Concept Of The Premetastatic Nichementioning
confidence: 99%
“…For diagnosis of TTM, Campbell et al proposed the following criteria: at least 2 primary tumors must exist, the metastatic focus must show established growth inside the host tumor and not be of contiguous growth, and the host tumor must be a true neoplasm and cannot be a lymph node involved in leukemia or lymphoma. [ 1 , 35 ] Our case fulfilled the inclusion criteria for TTM established by Campbell et al Previous studies presented different hypotheses related to the reasons why meningioma is the most common intracranial host in TTM. Meningiomas can provide an accessible and favorable environment for growth to receive metastases [ 19 ] because they are highly vascular tumors [ 36 ] and exhibit slow growth and an indolent nature.…”
Section: Discussionmentioning
confidence: 84%
“…TTM is also an uncommonly described phenomenon throughout the human medicine literature, with <100 cases affecting the CNS. 27 , 28 To our knowledge, only two cases of TTM have been described in the veterinary literature: one of a right heart auricle haemangiosarcoma with mammary gland tumour metastasis, 29 and the second of a forebrain oligodendroglioma hosting prostatic adenocarcinoma metastasis. 30 In people, meningioma represents the most frequent recipient tumour with TTM phenomenon affecting the CNS.…”
Section: Discussionmentioning
confidence: 99%