Copper defiency

[Birgitta-A]

Hi All,
Here is an interesting abstract from the MDS Conference 2013 in Berlin.

P-156 Berlin 2013
Hypocupremia associated cytopenia and myelopathy: A national retrospective review
A. Gabreyes1, H. Abbasi2, K.P. Forbes3, G. McQuaker1, A. Duncan4,I. Morrison5. 1Haematology, Glasgow Royal Infirmary, Glasgow, United Kingdom; 2Neurology, Glasgow Royal Infirmary, Glasgow, United Kingdom; 3Neuroradiology, Glasgow Royal Infirmary, Glasgow, United Kingdom; 4Scottish Trace Element and Micronutrient Reference Laboratory, Glasgow Royal Infirmary, Glasgow, United Kingdom;5Neurology, Ninewells Hospital, Dundee, United Kingdom

Background: Copper is an essential trace element that is involved in a number of important enzymatic processes throughout the body. Recent single case reports and small studies have shown that deficiency of copper can cause reversible haematological changes and irreversible neurological injury.

Introduction: We chose to undertake a national study, looking at all cases of copper deficiency in Scotland over a 5 year period using information from a national reference laboratory.

Results: From 16 identified patients, we determined that 86% had both haematological and neurological features of copper deficiency, while 18% had haematological features only at presentation.

Twelve of the sixteen patients had high serum zinc concentrations (>18 μm/L)due to zinc containing dental fixatives (9 patients), oral zinc replacement therapy following proximal bowel resection (1 patient), Wilson’s Disease treated with zinc (1patient) and skin burns requiring topical zinc therapy (1 patient).

94% of patients had haematological features as an initial manifestation of copper deficiency, which included anaemia, thrombocytopenia and neutropenia. Patients who
underwent later bone marrow testing had appearances in keeping with refractory cytopenia with multilineage dysplasia, refractory anaemi with excess of blasts, unclassified marrow dysplasia or probable myelodysplasia (MDS).

75% of patients had neurological symptoms or signs, including progressive walking difficulties and paraesthesia, or gait difficulties without sensory signs. Clinical examination was in keeping with spastic paraparesis (either with or without sensory
neuropathy).

Magnetic resonance imaging (MRI) showed multifocal T2 hyper intense foci in the sub cortical white matter, and atrophy of the cerebrum and cerebellum was also seen on computerised tomography (CT). MRI of the spinal cord showed signal change in the dorsal columns either in the cervical or thoracic cord.

93% of cytopenias responded to copper replacement and addressing the original cause of the copper deficiency, but only 25% of patients had improvement in their neurological function, while 33% deteriorated and 42% remained unchanged.

Conclusions: Our study demonstrates that copper deficiency is an under-recognised cause of several types of cytopenia, which are reversible but can progress to significant neurological injury if left untreated. We illustrate the importance of identifying these patients early to prevent irreversible neurological injury.
Kind regards
Birgitta-A

[Chirley]

Thanks for that Birgitta.

I was aware of the content of the article but not the stats.

There is also an abstract in one of the neuro journals which gives some hope in regards neuro progression. A recent study has shown that in patients who have had a previous treated copper deficiency and they become copper deficient again, they don't necessarily have a further neuro deterioration. This is what I'm grasping onto at the moment.

I have also read an article somewhere that has found a small number of patients with idiopathic hyperzincaemia and hypocupraemia. This is the category that I fall into and which they think is associated with the del 15q.

I saw a clinical trial somewhere (US, I think) that was focused on copper deficiency causes and treatments. I remember reading some of the criteria and I didn't qualify so I didn't read the whole article.

Regards

Chirley

[Birgitta-A]

Hi Chirley,
As Marlene has written many times it is important that hematologists are aware of that copper defiency can mimic MDS. These 16 patients got their dx very late like you and probably a lot of patients never get the correct dx.

Very interesting with hyperzincaemia, hypocupraemia and del 15q.
Kind regards
Birgitta-A

[Marlene]

Thanks for posting this Birgitta. I am going to repost this on a MS site where the this topic of copper def. came up and the need to test for low copper in MS patients.