A 52-year-old plumber is in the Acute Medical Unit
A 52-year-old plumber is in the Acute Medical Unit after presenting with new bilateral lower limb weakness. He reports this has come on over the past week but today caused two falls. On further questioning, he also reports a couple of months’ history of abdominal pain and constipation, as well as trouble sleeping.
He has no other past medical history and takes no regular medication. On examination, he has bilateral weakness of ankle dorsiflexion and plantarflexion, but normal sensation.
His blood results show:
| Hb | 108 g/L | Male (130-180 g/L) |
| WBC | 8.4 x 10⁹/L | (4.0-11.0 x 10⁹/L) |
| Platelets | 205 x 10⁹/L | (150-500 x 10⁹/L) |
| MCV | 76 fL | (82-100 fL) |
| MCH | 22 pg | (27-32 pg) |
| Blood film | Basophilic stippling |
What is the most likely diagnosis?
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