Paraneoplastic syndromes - Ronny Allan - Living with Neuroendocrine Cancer

Tag: Paraneoplastic syndromes

Paraneoplastic syndromes are a group of rare disorders that are triggered by an abnormal immune system response to a cancerous tumour known as a “neoplasm.” Paraneoplastic syndromes are thought to happen when cancer-fighting antibodies or white blood cells (known as T cells) mistakenly attack normal cells in the nervous system. These disorders typically affect middle-aged to older people and are most common in individuals with lung, ovarian, lymphatic, or breast cancer. Neurologic symptoms generally develop over a period of days to weeks and usually occur prior to the tumor being discovered. These symptoms may include difficulty in walking or swallowing, loss of muscle tone, loss of fine motor coordination, slurred speech, memory loss, vision problems, sleep disturbances, dementia, seizures, sensory loss in the limbs, and vertigo or dizziness. Paraneoplastic syndromes include Lambert-Eaton myasthenic syndrome, stiff-person syndrome, encephalomyelitis, myasthenia gravis, cerebellar degeneration, limbic or brainstem encephalitis, neuromyotonia, opsoclonus, and sensory neuropathy.

There’s a paper from 2010 which has outlined some of these issues in relation to NETs (Neuroendocrine Neoplasms).

28Jul 2020 by Ronny Allan 3 Comments

Paraneoplastic Syndromes – the NET Effect

Patient Advocacy, Survivorship, The NET Effect Series

Spectrum of paraneoplastic humoral syndromes secondary to NETs. CT, calcitonin; PTHrP, parathyroid hormone related peptide; CGRP, calcitonin gene related peptide; GLP, glucagon like peptide; ANP, atrial natriuretic peptide; VIP, vasointestinal peptide (*). Citation: Endocrine-Related Cancer 17, 3; 10.1677/ERC-10-0024 (* Author's note: not the usual description of VIP indicating a potential ectopic context) Although several hypotheses have been proposed regarding the pathogenesis of PNSs, the precise mechanism that leads to the development of PNS remains largely unknown. (In simple terms, pathogenesis means "the manner of development of a disease"Disclaimer. I read widely and noted various papers where there was clearly confusion about the classification of paraneoplastic in relation to Neuroendocrine Neoplasms. Some papers grouped known Neuroendocrine Tumour hormonal syndromes in, but others were more specific by filtering these into ectopic scenarios. …

10Aug 2015 by Ronny Allan 16 Comments

The Syndromes of Neuroendocrine Cancer – Early Signs of a Late Diagnosis

Awareness

The Syndromes of Neuroendocrine Cancer - Early Signs of a Late DiagnosisOne of the curious things about Neuroendocrine Cancer (NETs elsewhere in the text) is that it can very often exhibit one or more vague symptoms collectively known as a 'syndrome'. Syndrome is an apt word to describe these complications as the most general meaning in medical terms is a group of symptoms that together are characteristic of a specific disorder or disease". Having a syndrome can often be the difference between having a 'functional' condition or a non-functional' condition - see more below.This frequently makes Neuroendocrine Cancer very difficult to diagnose quickly. It's a very devious disease.Functional / Non-FunctionalThese tumours and associated syndromes are treatable for most but the difficult part can be arriving at a diagnosis. Moreover, without a syndrome, some of these…