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	<id>https://idwiki.org/index.php?action=history&amp;feed=atom&amp;title=Porphyria_cutanea_tarda</id>
	<title>Porphyria cutanea tarda - Revision history</title>
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	<updated>2026-05-13T00:16:36Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://idwiki.org/index.php?title=Porphyria_cutanea_tarda&amp;diff=5096&amp;oldid=prev</id>
		<title>Aidan: Text replacement - &quot;Clinical Presentation&quot; to &quot;Clinical Manifestations&quot;</title>
		<link rel="alternate" type="text/html" href="https://idwiki.org/index.php?title=Porphyria_cutanea_tarda&amp;diff=5096&amp;oldid=prev"/>
		<updated>2020-07-20T14:19:35Z</updated>

		<summary type="html">&lt;p&gt;Text replacement - &amp;quot;Clinical Presentation&amp;quot; to &amp;quot;Clinical Manifestations&amp;quot;&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 14:19, 20 July 2020&lt;/td&gt;
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  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 8:&lt;/td&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 8:&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* A defect in uroporphyrinogen decarboxylase, which normally converts uroporphyrinogen I and III to coproporphyrinogen I and III&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* A defect in uroporphyrinogen decarboxylase, which normally converts uroporphyrinogen I and III to coproporphyrinogen I and III&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Clinical &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Manifestations&lt;/ins&gt; ==&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Blistering skin lesions on the back of the hands&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Blistering skin lesions on the back of the hands&lt;/div&gt;&lt;/td&gt;
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		<author><name>Aidan</name></author>
	</entry>
	<entry>
		<id>https://idwiki.org/index.php?title=Porphyria_cutanea_tarda&amp;diff=4413&amp;oldid=prev</id>
		<title>Maintenance script: Imported from text file</title>
		<link rel="alternate" type="text/html" href="https://idwiki.org/index.php?title=Porphyria_cutanea_tarda&amp;diff=4413&amp;oldid=prev"/>
		<updated>2020-07-04T01:17:51Z</updated>

		<summary type="html">&lt;p&gt;Imported from text file&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;== Definition ==&lt;br /&gt;
&lt;br /&gt;
* A defect in the heme synthesis pathway that causes cutaneous manifestations in adults&lt;br /&gt;
* Either type 1 (sporadic) or type 2 (familial)&lt;br /&gt;
&lt;br /&gt;
== Pathophysiology ==&lt;br /&gt;
&lt;br /&gt;
* A defect in uroporphyrinogen decarboxylase, which normally converts uroporphyrinogen I and III to coproporphyrinogen I and III&lt;br /&gt;
&lt;br /&gt;
== Clinical Presentation ==&lt;br /&gt;
&lt;br /&gt;
* Blistering skin lesions on the back of the hands&lt;br /&gt;
** They rupture and crust over, leaving atrophy and scarring&lt;br /&gt;
** Scarring and calcification can look like sclerosis&lt;br /&gt;
* Lesions may appear on forearms, face, legs, and feet&lt;br /&gt;
* May have hyperpigmentation and hypertrichosis of the face&lt;br /&gt;
* No neurological manifestations&lt;br /&gt;
* Often have liver disease, and are higher risk for hepatocellular carcinoma&lt;br /&gt;
&lt;br /&gt;
== Investigations ==&lt;br /&gt;
&lt;br /&gt;
* Porphyrins in liver, plasma, urine, or stool are elevated&lt;br /&gt;
** Urinary porphyrins include uroporphyrins and heptacarboxylate porphyrin&lt;br /&gt;
* Urinary ALA level may be elevated&lt;br /&gt;
* PBG level is normal&lt;br /&gt;
&lt;br /&gt;
== Management ==&lt;br /&gt;
&lt;br /&gt;
* Avoid alcohol&lt;br /&gt;
* Stop estrogen supplements, iron supplements, and any other drugs that may be exacerbating&lt;br /&gt;
* Repeated phlebotomy to reduce hepatic iron stores&lt;br /&gt;
** Remove 1 unit every 1 to 2 weeks&lt;br /&gt;
** Remission may require more than six phlebotomies&lt;br /&gt;
** Follow the serum porphyrin levels every 6 to 12 months; they should decrease&lt;br /&gt;
* Hydroxychloroquine is second-line&lt;br /&gt;
* Liver imaging to screen for hepatocellular carcinoma&lt;br /&gt;
&lt;br /&gt;
[[Category:Hematology]]&lt;br /&gt;
[[Category:Dermatology]]&lt;/div&gt;</summary>
		<author><name>Maintenance script</name></author>
	</entry>
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