porphyria Flashcards
- Urine ALA, PBG
* None in rbc and stool
– AIP
– CEP versus HEP
- Uro in RBCs of CEP
* Proto in RBCs of HEP
– VP versus PCT
• Copro > or = Uro in urine in VP
• Copro in Urine, rbcs and stool
– HCP
- Uro in Urine
* Proto in rbc and Copro in stool
– HEP
- None in urine
- Proto in rbc and stool
- Rbcs transiently fluoresce
– EPP
- Urine– URO
- Uro rbc and Copro stool
- Rbcs and teeth fluoresce
– CEP
• Urine
– Uro < or = Copro
– None in rbc and Proto in stool
– Plasma fluoresces at 626 nm diagnostic
– VP
• Urine fluoresces
– Uro > Corpo (3:1 or greater)
• None in rbc and Isocopro in stool
– PCT
- Gunther’s
- Red urine soon after birth
- Red teeth
- Hypertrichosis (werewolf appearance)
- Extreme photosensitivity
– CEP
only oxidized porphyrin
• Protoporphyrin IX
- Porphyrins deposited in liver
* Beta carotene may help
– EPP
– EPP
• Immediate burning on sun exposure
?? sunlight can trigger
• Protoporphyrin IX absorbs at 400-410 nm and 500-600 nm
– ALA dehydrase deficiency
– Acute intermittent porphyria (AIP)
– Hepatic coproporphyria (HC)
– Variegate Porphyria (VP)
Porphyrias
• Acute
1 type Porphyrias
– PCT
• Soret band
400-410 nm
- Sun-exposed bullae and scarring
- Hypertrichosis
- Sclerodermoid changes
PCT
– Sunscreens do little in PCT as
Soret Band out of reach
- Avoid ETOH, inciting meds
* Phlebotomy, antimalarials, treat HCV
PCT treatment
- Homozygous form of PCT
- Like CEP clinically but milder
- Dark, red urine at birth
- Scarring and red teeth
- Sun avoidance
– HEP
- PCT skin finding and AIP systemic disease
- South Africans
- Triggers and treatment similar to AIP
– VP
• AD
– VP
• Similar to AIP and VP
– HCP
• #2 most common
– AIP