Dermatology · Vascular Lesions
The facts most likely to be tested
Hereditary Hemorrhagic Telangiectasia (Osler-Weber-Rendu syndrome) is an autosomal dominant disorder characterized by diffuse telangiectasias, recurrent epistaxis, and arteriovenous malformations (AVMs).
CREST syndrome (limited systemic sclerosis) presents with calcinosis cutis, Raynaud phenomenon, esophageal dysmotility, sclerodactyly, and telangiectasias.
Ataxia-telangiectasia is an autosomal recessive condition caused by a defect in the ATM gene, leading to cerebellar ataxia, oculocutaneous telangiectasias, and IgA deficiency.
Spider telangiectasias (spider angiomas) are commonly associated with hyperestrogenism seen in liver cirrhosis, pregnancy, or combined oral contraceptive use.
Basal cell carcinoma frequently presents as a pearly papule with overlying arborizing telangiectasias.
Rosacea is a chronic inflammatory skin condition characterized by facial erythema, papules, pustules, and prominent telangiectasias on the cheeks and nose.
Nevus flammeus (port-wine stain) is a capillary malformation that does not regress and may be associated with Sturge-Weber syndrome if located in the V1/V2 trigeminal distribution.
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A 52-year-old female presents to the clinic with a 6-month history of progressive difficulty swallowing and cold-induced color changes in her fingers. Physical examination reveals tight, thickened skin on the fingers, calcium deposits on the elbows, and dilated, small red vessels on the face and palms. She also reports frequent heartburn. Laboratory studies show positive anti-centromere antibodies.
What is the most likely diagnosis?
CREST syndrome (Limited Systemic Sclerosis)
The patient's presentation of sclerodactyly, calcinosis, Raynaud phenomenon, esophageal dysmotility, and telangiectasias, combined with anti-centromere antibodies, is diagnostic for CREST syndrome.
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High yield triage
Etiology / Epidemiology
Associated with Hereditary Hemorrhagic Telangiectasia (HHT), chronic sun exposure, and liver cirrhosis.
Clinical Manifestations
Visible dilated superficial blood vessels; spider angiomas are pathognomonic for hyperestrogenism.
Diagnosis
Clinical diagnosis; skin biopsy if malignancy suspected. Use endoscopy for HHT screening.
Treatment
Cosmetic: laser therapy. Underlying: treat systemic cause. Avoid trauma to lesions.
Prognosis
Generally benign; HHT carries risk of life-threatening arteriovenous malformations.
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Epidemiology & Etiology
Telangiectasias arise from chronic sun damage, rosacea, or systemic conditions like Osler-Weber-Rendu syndrome. They are common in patients with liver cirrhosis due to impaired estrogen metabolism. Genetic predisposition is the primary driver in HHT.
Pertinent Anatomy
These lesions represent permanently dilated capillaries or venules located in the superficial dermis. They lack a muscular wall, making them prone to blanching under pressure.
Pathophysiology
Dilation occurs due to structural weakness or hormonal influence, specifically elevated estrogen levels. In Osler-Weber-Rendu, mutations in endoglin or ALK-1 genes lead to defective vascular wall integrity and arteriovenous shunting.
Clinical Manifestations
Lesions appear as fine, red, linear or branching vessels. Spider angiomas feature a central arteriole with radiating legs that blanch on compression. Red flags include recurrent epistaxis or GI bleeding, which suggest HHT and potential internal arteriovenous malformations.
Diagnosis
Diagnosis is primarily clinical via diascopy (blanching test). In suspected HHT, the Curaçao criteria are used for clinical diagnosis. Endoscopy is the gold standard for identifying internal vascular lesions in symptomatic patients.
Treatment
Primary treatment for cosmetic lesions is pulsed dye laser therapy. For systemic conditions, manage the underlying pathology. Avoid topical corticosteroids as they can exacerbate atrophy and vessel prominence. Surgical excision is reserved for bleeding lesions.
Prognosis
Isolated telangiectasias are benign. Patients with HHT require lifelong monitoring for pulmonary or cerebral AVMs, which carry a high risk of hemorrhage or stroke.
Differential Diagnosis
Spider Angioma: blanches with central pressure
Cherry Angioma: does not blanch, common in aging
Rosacea: associated with flushing and papules
Basal Cell Carcinoma: pearly border with arborizing vessels
Port-wine stain: congenital, does not blanch