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You are here: Home / Articles / Case Report: A Rare But Severe Complication of Dermatomyositis

Case Report: A Rare But Severe Complication of Dermatomyositis

May 13, 2021 • By Akrithi Udupa, MD, Paul McIntosh, MD, Thomas J. Cummings, MD, & Lisa Criscione-Schreiber, MD, Med

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Dermatomyositis is an uncommon autoimmune condition involving skeletal muscle characterized by subacute onset of progressive weakness, intramuscular inflammatory infiltrates and the presence of myositis-specific autoantibodies.1 Immune-mediated myopathies may exert some pathogenic effects on the muscle tissue by targeting the microvasculature.1 Capillary inflammation, fragility and loss may contribute to heightened bleeding events in these patients.

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May 2021

Here, we discuss a case of acute hemorrhagic dermatomyositis, a rare, highly morbid complication of dermatomyositis.

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Case History

A previously healthy, 66-year-old man presented with gradual onset of painfully swollen and stiff upper and lower extremities, diffuse rash and progressive weakness. He worked as a custodian and reported that he’d had difficulty lifting trash cans and climbing stairs for the past two months. He also reported that during the preceding two weeks he’d been struggling to reach for his seatbelt and had difficulty getting in and out of his truck. He ultimately presented for medical attention because he could no longer ambulate independently.

Over the past year, he had experienced fatigue, episodic dizziness, daytime and nighttime sweats, reduced appetite, trouble swallowing and unintentional weight loss. He lived alone and had not seen a medical provider for more than five decades until the previous month, following an emergency department visit. He had a 45-pack-year smoking history and a remote history of heavy alcohol use.

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Vital signs in the emergency department were normal. An examination revealed a chronically ill-appearing man in no acute distress. He had multiple, erythematous, pearly nodules up to four centimeters in diameter on his left forehead, right eyebrow and left neck, suggestive of basal cell carcinoma (see Figure 1).

An erythematous maculopapular poikilodermic rash was present on his scalp, forehead, cheeks, neck, chest, upper back, upper arms, and dorsal aspects of his metacarpophalangeal and interphalangeal joints of his digits. He had painful periungual erythema of his fingernails.

His neurologic exam was notable for symmetric proximal weakness, with his upper extremities being weaker than his lower extremities. Manual muscle testing revealed the following Medical Research Council (MRC) grades: cervical flexion and extension 5/5, deltoids 2/5, biceps and triceps 3/5, wrist extensors and flexors 5/5 apart from 4+/5 left wrist extension, finger abduction 4+/5, finger flexion 5/5, hip flexion 3/5, quadriceps 5-/5, hamstrings 4+/5, anterior tibialis 5/5, gastrocnemius 5/5.

The physical examination revealed multiple, large, erythematous pearly nodules suggestive of basal cell carcinoma, as shown on his left temple, and a diffuse poikilodermic rash (maroon arrows).

Figure 1. The physical examination revealed multiple, large, erythematous pearly nodules suggestive of basal cell carcinoma, as shown on his left temple, and a diffuse poikilodermic rash (maroon arrows).

He had no ocular, facial or bulbar weakness or sensory deficits. His deep tendon reflexes were trace at the biceps, brachioradialis and Achilles tendons. His patellar reflexes were 3+ with crossed adduction in both limbs. The remainder of the exam was unremarkable.

Emergency department laboratory testing from four weeks before was notable for normal renal function, normal blood counts, aspartate aminotransferase (AST) 313 IU/L (normal: 10–50 IU/L) and alanine aminotransferase (ALT) 124 IU/L (normal: 10–44 IU/L).

At follow-up with his primary care provider four days later, his liver transaminases were persistently elevated: AST 301 IU/L, ALT 134 IU/L and alkaline phosphatase (ALP) 116 U/L (normal: 40–129 U/L). Other abnormally elevated laboratory studies at this visit included C-reactive protein (CRP) 30 mg/L, anti-nuclear antibody (ANA) 1:320 with speckled pattern, anti-smooth muscle antibody (ASMA) 54 U, anti-mitochondrial antibody (AMA) 43.8 U, rheumatoid factor (RF) 57.8 IU/mL. Lyme IgG/IgM and Rocky Mountain Spotted Fever IgM screening tests fell within equivocal range.

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Filed Under: Conditions Tagged With: case report, dermatomyositis (DM), hemorrhagic dermatomyositisIssue: May 2021

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