Diagnosis and Treatment > Intervention > Analgesics
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University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
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University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
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Summary
Diabetic myonecrosis, also known as diabetic muscle infarction is a rare complication of diabetes mellitus usually associated with longstanding suboptimal glycaemic control. Although theories of atherosclerosis, diabetic microangiopathy, vasculitis, ischaemia-reperfusion injury and hypercoagulable state have been proposed to explain the pathophysiology, none of these have been able to individually explain the pathophysiology in entirety. Diabetic renal disease is the most common risk factor for developing DMN and its recurrence. The diagnosis is often missed due to lack of awareness and the presentation mimicking other conditions associated with DM. The routine laboratory investigations are often non-specific and do not provide much value in the diagnosis as well. Muscle biopsy can provide a definite diagnosis but is not currently recommended due to its invasiveness and association with prolonged time to symptoms resolution. Magnetic resonance imaging, in combination with classic history and risk factors can clinch the diagnosis. Treatment is generally analgesia and rest, although the former’s use may be limited in the presence of renal disease.
Learning points:
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Diabetic myonecrosis is a rare complication of diabetes mellitus associated with longstanding suboptimal glycaemic control.
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Diabetic renal disease is a known risk factor, although the evidence is merely observational.
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Although muscle biopsy could provide a definite diagnosis, it is not recommended as it can prolong the disease process and should be reserved only for cases not responding to conventional treatment.
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Typical MRI findings in combination with classic symptoms and risk factors can clinch the diagnosis
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Current treatment recommendations include NSAIDs and/or aspirin (if not contraindicated) alongside bed rest. Physiotherapy is not recommended in the acute phase but should be started as soon as patient is discharged from hospital.
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Optimal glycaemic control is key to prevent recurrence.
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Summary
Necrobiosis lipoidica diabeticorum (NLD) is a chronic granulomatous dermatitis generally involving the anterior aspect of the shin, that arises in 0.3–1.2% of patients with diabetes mellitus (1). The lesions are often yellow or brown with telangiectatic plaque, a central area of atrophy and raised violaceous borders (2). Similar to other conditions with a high risk of scarring including burns, stasis ulcers and lupus vulgaris, NLD provides a favourable environment for squamous cell carcinoma (SCC) formation (3). A number of cases of SCC from NLD have been recorded (3, 4, 5); however, our search of the literature failed to identify any cases of either metastatic or fatal SCC which developed within an area of NLD. This article describes a patient with established type 1 diabetes mellitus who died from SCC which developed from an area of NLD present for over 10 years. Currently, there are a paucity of recommendations in the medical literature for screening people with NLD for the early diagnosis of SCC. We believe that clinicians should regard non-healing ulcers in the setting of NLD with a high index of clinical suspicion for SCC, and an early biopsy of such lesions should be recommended.
Learning points:
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Non-healing, recalcitrant ulcers arising from necrobiosis lipoidica diabeticorum, which fail to heal by conservative measures, should be regarded with a high index of clinical suspicion for malignancy.
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If squamous cell carcinoma is suspected, a biopsy should be performed as soon as possible to prevent metastatic spread, amputation or even death.
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Our literature search failed to reveal specific recommendations for screening and follow-up of non-healing recalcitrant ulcers in the setting of necrobiosis lipoidica diabeticorum.
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Further research is required in this field.
Monash Centre for Health Research and Implementation, Clayton, Australia
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Hudson Institute of Medical Research, Clayton, Australia
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Hudson Institute of Medical Research, Clayton, Australia
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Hudson Institute of Medical Research, Clayton, Australia
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Monash Centre for Health Research and Implementation, Clayton, Australia
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Hudson Institute of Medical Research, Clayton, Australia
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Summary
The association between type 1 diabetes mellitus (T1DM) and bone health has garnered interest over the years. Fracture risk is known to be increased in individuals with T1DM, although bone health assessment is not often performed in the clinical setting. We describe the case of a 21-year-old male with longstanding T1DM with multilevel vertebral fractures on imaging, after presenting with acute back pain without apparent trauma. Dual-energy X-ray absorptiometry (DXA) revealed significantly reduced bone mineral density at the lumbar spine and femoral neck. Extensive investigations for other secondary or genetic causes of osteoporosis were unremarkable, apart from moderate vitamin D deficiency. High-resolution peripheral quantitative computed tomography and bone biospy revealed significant alterations of trabecular bone microarchitecture. It later transpired that the patient had sustained vertebral fractures secondary to unrecognised nocturnal hypoglycaemic seizures. Intravenous zoledronic acid was administered for secondary fracture prevention. Despite anti-resorptive therapy, the patient sustained a new vertebral fracture after experiencing another hypoglycaemic seizure in his sleep. Bone health in T1DM is complex and not well understood. There are significant challenges in the assessment and management of osteoporosis in T1DM, particularly in young adults, where fracture prediction tools have not been validated. Clinicians should be aware of hypoglycaemia as a significant risk factor for fracture in patients with T1DM.
Learning points:
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Type 1 diabetes mellitus (T1DM) is a secondary cause of osteoporosis, characterised by reduced bone mass and disturbed bone microarchitecture.
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Hypoglycaemic seizures generate sufficient compression forces along the thoracic column and can cause fractures in individuals with compromised bone quality.
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Unrecognised hypoglycaemic seizures should be considered in patients with T1DM presenting with fractures without a history of trauma.
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Patients with T1DM have increased fracture risk and risk factors should be addressed. Evaluation of bone microarchitecture may provide further insights into mechanisms of fracture in T1DM.
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Further research is needed to guide the optimal screening and management of bone health in patients with T1DM.
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Summary
Methimazole is an anti-thyroid drug commonly used to treat hyperthyroidism and is a relatively safe medication. Several side effects have been reported and usually develop within 3 months of therapy. Well-known adverse reactions include agranulocytosis, hepatitis, skin eruptions, and musculoskeletal complaints such as myalgia, arthralgia, and arthritis. So far, myositis secondary to carbimazole was described in the context of a lupus-like syndrome or other rare cases of anti-neutrophil cytoplasmic antibodies-associated vasculitis. Methimazole-induced myositis occurring independently of such reactions was rarely stated. We report a patient with hyperthyroidism who, early after therapy with methimazole, developed hepatitis, eosinophilia, and fever that resolved completely after stopping the medication as well as a delayed onset of biopsy-proven eosinophilic myositis and fasciitis of gluteal muscles that resolved eventually without any additional therapy. Therefore, we raise the awareness regarding a rare side effect of methimazole: myositis.
Learning points
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Several differential diagnoses arise when managing a hyperthyroid patient with muscle complaints.
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Both hyperthyroidism and methimazole are associated with myositis.
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Methimazole-induced myositis is a rare clinical entity.
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Resolution of symptoms may occur after stopping methimazole.
