J Med Cases
Journal of Medical Cases, ISSN 1923-4155 print, 1923-4163 online, Open Access
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Case Report

Volume 10, Number 9, September 2019, pages 280-283


Significant Muscle Hemorrhage Associated With Low-Molecular-Weight Heparin Use in Dermatomyositis: A Case Report

Jin Young Leea, Jehun Kima, b

aDepartment of Internal Medicine, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Korea
bCorresponding Author: Jehun Kim, Department of Internal Medicine, Kosin University College of Medicine, 262, Gamcheon-ro, Seo-gu, Busan 602-702, Korea

Manuscript submitted August 12, 2019, accepted September 7, 2019
Short title: Muscle Hemorrhage in Dermatomyositis
doi: https://doi.org/10.14740/jmc3354

Abstract▴Top 

Dermatomyositis is a rare systemic inflammatory disease with characteristic skin features and muscular involvement. Few cases of hemorrhagic myositis with dermatomyositis have been reported worldwide. Here, we report a case of a 43-year-old man with dermatomyositis, which was treated with steroids and low-molecular-weight heparin. During the treatment course, he complained of acute left thigh pain. Computed tomography of the lower extremity showed hemorrhage in the left iliopsoas, iliacus, thigh muscle, and retroperitoneum. We discontinued heparin treatment and applied a splint with bed rest. Ultimately, he had a successful recovery. Patients with dermatomyositis may have an intrinsic risk of life-threatening muscle hemorrhage, and anticoagulation treatment may induce significant muscle hemorrhage in such patients.

Keywords: Dermatomyositis; Hemorrhage; Low-molecular-weight heparin; Iliopsoas muscle; Thigh muscle

Introduction▴Top 

Dermatomyositis (DM) is an autoimmune idiopathic inflammatory myopathy with characteristic skin features such as heliotrope rash, V sign, shawl sign, and holster sign, which are present on the face and other sites, including the back and extremities [1]. Symptoms of DM may include restrictive lung disease, interstitial lung disease, pneumomediastinum, myositis, arthritis, mechanic’s hands, cardiomyopathy, and fever [1, 2].

There have been few reports of DM causing hemorrhagic myositis [3-7]. We present a case of hemorrhagic myositis associated with the use of low-molecular-weight heparin (LMWH) in DM. The patient was treated for dermatomyositis with suspected pulmonary vein embolism but developed spontaneous hemorrhage of the left iliopsoas and iliacus muscles.

To the best of our knowledge, few cases of DM accompanied by hemorrhagic myositis have been reported worldwide to date, and none have been reported in Korea. Therefore, we describe the first Korean case report of DM with hemorrhagic myositis associated with LMWH.

Case Report▴Top 

The patient was a 43-year-old Korean man. His occupation was welding, and his medical history was clear. In February 2015, he developed fever with headache and visited a local hospital, where he was admitted. There he developed right supraorbital edema and cramping pain in both legs. Laboratory findings were as follows: D-dimer 395 ng/mL, aspartate aminotransferase (AST) 412 IU/L, alanine amino transferase (ALT) 217 IU/L, and creatine phosphokinase (CPK) 1,610 IU/L. Immunofluorescence assay was negative for antinuclear antibodies (ANAS), serum anti-Sm/RNP, anti-neutrophil cytoplasmic antibodies, anti-SSa and anti-SSb antibodies, anti-cardiolipin antibodies, anti-dsDNA antibodies, and anti-Jo-1 antibodies. Chest radiography showed haziness in both lower lobes. Computed tomography (CT) showed multifocal peribronchial consolidation and ground-glass opacity in both lower lobes, especially in the right subpleural area, and effusion. A filling defect (1.5 cm in diameter) was present in the distal right lower pulmonary vein (Fig. 1). Oral moxifloxacin 400 mg and intravenous methylprednisolone 125 mg were administered for 4 days, which slightly improved his symptoms.

Figure 1.
Click for large image
Figure 1. (a) Gottron’s papules on both hands. (b) Both periorbital edema and heliotrope rash. (c) Focal wedge-shaped consolidation in right lower lobe and filling defect in the distal right lower pulmonary vein (arrow).

Eventually, he was referred to our hospital in March 2015, where he presented with continued fever and headache. On admission, his height was 173 cm, body weight was 54.2 kg, body temperature was 37.3 °C, and other vital signs were normal. He exhibited DM-associated skin rashes, a heliotrope rash and edema on both eyelids and eruptions on the knuckles of both hands, the prepatellar areas, both shoulders, and the back (Fig. 1).

Laboratory findings were as follows: white blood cell count, 6,310/µL; hemoglobin, 13.9 g/dL; platelets, 177,000/µL; CPK, 293 IU/L; AST, 90 IU/L; ALT, 70 IU/L; and aldolase, 14.0 U/L. Para nasal sinuses (PNS) film showed fluid level in the right maxillary antrum, indicative of acute sinusitis or blood accumulation in the right maxillary antrum. Neurological examination showed no motor weakness. An electromyogram showed no definitive evidence of myopathy or polyneuropathy. Skin punch biopsies of rashes on his left hand, left knee, and right back revealed superficial and deep perivascular dermatitis.

Collectively, these symptoms led to a diagnosis of amyopathic DM with suspected right pulmonary vein thromboembolism [8]. Intravenous methylprednisolone (125 mg once a day) and subcutaneous enoxaparin (5,000 IU twice a day) were administered. Cutaneous symptoms and laboratory findings improved gradually.

After 10 days of treatment, the patient developed dyspnea, tachycardia, and left thigh pain. His hemoglobin decreased from 13.7 to 7.3 g/dL and blood pressure fell to 90/60 mm Hg. Platelets, prothrombin time (PT), activated partial thromboplastin time (APTT), and bleeding time (BT) were all normal. A CT scan showed hemorrhage of the left iliopsoas, iliacus, and retroperitoneum (Fig. 2). LMWH treatment was discontinued, and three units of packed red cells were transfused. We applied a splint on his lower extremities and adviced complete bed rest. He then recovered successfully and was discharged on 25 days after admission.

Figure 2.
Click for large image
Figure 2. CT scan of the lower extremities after bleeding. CT scan with contrast shows bleeding into (a) iliopsoas muscle (arrow), and (b) thigh muscle (arrow). CT: computed tomography.
Discussion▴Top 

The occurrence of hemorrhagic myositis associated with DM on heparin treatment is a rare but potentially fatal situation. To the best of our knowledge, only few cases have been reported [3-7]. We analyzed these six patients including our case (Table 1 [3-7]). Case 1: an 80-year-old man was diagnosed with DM. He was treated with intravenous methylprednisolone followed by oral prednisone. Prophylactic treatment with unfractionated heparin (UFH) was also initiated. Although APTT was slightly prolonged, at 42 s, PT and BT were normal. After 10 days, CT showed left rectus sheath and oblique right thigh muscle hemorrhage. Case 2: a 77-year-old woman was diagnosed with DM with interstitial pneumonia. She was treated with intravenous methylprednisolone followed by oral prednisone. After 2 weeks, she reported chest wall pain. A diagnosis of unstable angina was made, and a daily regimen of UFH, ticlopidine, and aspirin was initiated. After 4 days, hemorrhage of the left iliopsoas, iliacus, and retroperitoneum was found. APTT was prolonged and PT was normal. Case 3: a 64-year-old woman was diagnosed with DM with rapidly progressive interstitial pneumonia. She was treated with steroids, cyclosporin A, cyclophosphamide and LMWH (dalteparin). On day 10, she complained of lower abdominal pain. CT showed hemorrhage in the right psoas and iliacus, retroperitoneum, and left rectus sheath. APTT and PT were normal. Case 4: a 65-year-old woman was diagnosed with DM. She was treated with intravenous methylprednisolone for 3 days, followed by oral prednisolone. Treatment with prophylactic UFH was initiated. After 4 days, APTT was prolonged, at > 100 s; PT was normal. CT showed hemorrhage of the iliopsoas muscle on both sides and the thigh muscles. Case 5: a 60-year-old man was diagnosed with DM. He was treated with oral prednisolone. On day 25, he developed respiratory failure. An intravenous pulse of methylprednisolone and UFH were initiated. After 6 days of treatment, CT showed intramuscular hemorrhage from the left deltoid. APTT was prolonged at 89 s. UFH was discontinued. However, after 3 days, a second hemorrhage occurred despite normal coagulability. CT showed another intramuscular hematoma in the trapezius muscle.

Table 1.
Click to view
Table 1. Comparison of Six Cases of Dermatomyositis Accompanied by Hemorrhagic Myositis With Heparin Use
 

Orrel et al [9] presented two cases in which hemorrhage in patients with DM was presumed to be related to trauma or vessel wall fragility caused by capillary vasculitis, because patients did not have a bleeding diathesis and heparin was not used. However, recently, muscle hemorrhage was found in a patient receiving anticoagulant therapy. Heparin treatment results in an increased risk of major bleeding [10]. The use of LMWH can lead to major complications, such as acute abdominal hemorrhage, which can be life-threatening [11].

In four of the six cases discussed here, bleeding occurred in the iliopsoas muscle. Patients who are anticoagulated with heparin are at an increased risk of developing an iliacus or psoas hematoma, manifesting in a wide range of symptoms from groin pain to massive bleeding and shock [12]. Identification of these occurrences is crucial in patients with DM.

In patients with DM, capillary depletion occurs and capillary density is significantly decreased. These capillary changes are not present in patients with polymyositis. We believe that muscle hemorrhage in DM is related to vessel fragility due to capillary vasculitis, muscle tissue weakness caused by steroid treatment of DM, and the use of anticoagulant agents.

Here, we report a case of DM complicated with spontaneous intramuscular hemorrhage while on heparin. This case and others suggest that when treating a patient with DM, we need to think twice about heparin therapy.

DM is a well-known condition that represents acquired and potentially treatable causes of skeletal muscle weakness. However, DM with hemorrhagic myositis is a rare condition, with few cases having been reported worldwide and none reported in Korea. Here, we reported a rare case of DM accompanied by hemorrhagic myositis with the use of LMWH. We expect that our case report will inform clinicians of the risk of using heparin in patients with inflammatory myopathy.

Acknowledgments

The patient was treated at Kosin University Gospel Hospital, Busan, South Korea.

Financial Disclosure

None to declare.

Conflict of Interest

None to declare.

Informed Consent

Informed consent was obtained from the patient for publication of this case report and any accompanying images.

Author Contributions

Both authors contributed to the writing and editing of this manuscript as well as being involved in the patient treatment.


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