hepc- other, thyroid Flashcards
Porphyria Cutanea Tarda (PCT)
• Caused by a deficiency in
uropoprhyrinogen decarboxylase (UROD);
mechanisms transmission
inherited,sporadic or associated with Hepatitis C
___ form may occur in association with HCV; in one study___% of patients with PCT
had HCV-antibodies
• Sporadic
82
alcohol, estrogens, and polyhalogenated hydrocarbons
environmental triggers hep c
facial hypertrichosis, hyper/hypopigmentation, skin fragility and sclerodermoid changes.
hcv
The pathogenesis of HCV related PCT might be related to
decompartmentalization of iron stores resulting in formation of free iron radicals and oxidation of UROD
phlebotomy to decrease iron load, interferon based regimens and
avoidance of triggering factors
Treatment hcv
Lichen Planus
• Incidence of HCV in patients with lichen planus varies from
0.1% to 35%, depending on region
• Treatment with interferon impact skin lesions
both worsening and improvement of the
Polyarteritis Nodosa___% of patients were HCV+
12-31
also associated with Hepatitis B
Polyarteritis nodosa
Pruritus in chronic HCV infection
pathogenesis may be related to but not always a direct correlation
elevated bile salt levels that occur in the setting of liver failure
cholestyramine, ursodeoxycholic acid, rifampin, naltrexone,
thalidomide, and UVA, UVB and interferon alpha
• Treatment regimens hcv pruritus
- Erythema nodosum
- Erythema multiforme
- Unilateral nevoid telangiectasia
- Pyoderma gangrenosum
- Vitiligo
- Psoriasis
Uncommon Associations hep c
Behçet’s syndrome
• Mooren corneal ulcers
• Granuloma annulare
• Disseminated superficial actinic porokeratosis
Uncommon Associations hep c
alopecia, lichenoid eruption,
eczema, malar erythema, and local
cutaneous necrosis
most frequently reported
cutaneous findings with interferon
combination of interferon α and ribavirin. T
Currently the best management of Hepatitis C is the
cutaneous reactions were
more common in the group on combination interferon/ribavirin therapy therapy
T/F
T
Thyroglossal Duct Cyst
Malignant degeneration to
papillary adenocarcinoma COMMON?
F. rare
Metastases to the skin from a thyroid malignancy is rare but Most reported cases occur with
papillary adenocarcinoma
Sipple syndrome, Sipple syndrome, autosomal dominant
MEN 2b/III
medullary thyroid carcinoma, pheochromocytoma, and parathyroid
hyperplasia/adenomas.
medullary thyroid carcinoma,
pheochromocytoma, marfanoid features, and gastrointestinal ganglioneuromatosis.
Skin findings in Sipple syndrome are rare but may include
lichen or macular amyloidosis
Sipple syndrome gene defect
RET proto-oncogene, which encodes a tyrosine receptor kinase.
most common skin finding is mucosal neuromas.
MEN 2b/III