MyMedR

Fulltext Effect of pyridostigmine (Mestinon) on human platelet aggregation

Leong CF, Aini-Ardena M, Cheong SK, Norris N

Malays J Pathol, 2009 Jun;31(1):45-52.

PMID: 19694313 MyJurnal

Normal platelet functions are critical for achieving primary haemostasis. Numerous medications have been shown to affect platelet functions. Pyridostigmine (Mestinon), an orally active cholinesterase inhibitor that is commonly used to treat myasthenia gravis has been documented to cause epistaxis and prolonged bleeding after a cut in anectodal reports. This study was initiated after a patient diagnosed to have myasthenia gravis, developed multiple bruises a week after being started on Mestinon. The objective of this study was to investigate the effect of Mestinon on platelet aggregation stimulated with various agonists in vitro.

Matched MeSH terms: Pyridostigmine Bromide/adverse effects*; Pyridostigmine Bromide/contraindications

"Mummy, my eyelids are heavy": A case series of juvenile myasthenia gravis

Krishna L, Abdul Jalil NF, Lott PW, Singh S, Choo MM

Eur J Ophthalmol, 2021 Mar;31(2):NP119-NP122.

PMID: 31390886 DOI: 10.1177/1120672119867605

PURPOSE: To report three cases of juvenile myasthenia gravis aged between 18 and 24 months with ocular symptoms as their first presentation.

METHOD: A case series.

RESULTS: We present a case series of juvenile myasthenia gravis in a tertiary centre in Malaysia. Two of the three cases consist of a pair of twins who presented with ptosis of bilateral eyes; the first twin presented 4 months later than the second twin. These two cases were positive for anti-acetylcholine receptor antibodies and had generalized myasthenia gravis, whereas the other case was negative for receptor antibodies and was purely ocular myasthenia gravis.

CONCLUSION: Juvenile myasthenia gravis is relatively rare in toddlers. Early diagnosis and commencement of treatment is important to slow the progression of the disease and avoiding life-threatening events.

Matched MeSH terms: Pyridostigmine Bromide/therapeutic use

Fulltext Flaccid paralysis in an infant associated with a dirty wound and application of honey

Joseph CJ, Khoo TB, Lee KY

BMJ Case Rep, 2017 Jan 06;2017.

PMID: 28062435 DOI: 10.1136/bcr-2016-218044

An infant, who was born preterm at 36 weeks, presented with fever and ulcer at umbilical region which progressed to necrotising fasciitis of anterior abdominal wall. He was treated with intravenous penicillin, intravenous cloxacillin and local application of medicated honey. Subsequently, he required wound debridement. Postoperatively, he required prolonged invasive ventilation due to poor respiratory effort which was associated with hypotonia and areflexia. Nerve conduction study revealed absent responses. The diagnosis of infant botulism was made based on the clinical presentation, nerve conduction study and his clinical progress. Botulinum immunoglobulin was not available. He was treated with intravenous immunoglobulin and oral pyridostigmine. He was successfully extubated after 37 days, and currently the patient is doing well.

Matched MeSH terms: Pyridostigmine Bromide/therapeutic use*

Fulltext "Why do I always see double?" A misdiagnosed case of ocular myasthenia gravis for 10 years

Yousuf UA, Yashodhara BM, Thanigasalam T, Ting HS

BMJ Case Rep, 2014 May 02;2014.

PMID: 24792021 DOI: 10.1136/bcr-2013-203488

A 58-year-old man presented with diplopia and partial ptosis for 10 years. It was non-progressive in nature, despite inadequate medical attention the patient received from non-specialists/general practitioners. He did not have fatigability or diurnal variation in weakness and was clinically stable without exacerbations of disease for a decade. He did not have features of Graves's disease, oculopharyngeal dystrophy, cranial nerve paralysis, polymyositis and stroke. The possibility of an atypical presentation of myasthenia gravis (MG) was considered and the patient was evaluated. Ice pack test was negative, Cogan's lid twitch (CLT) test was positive and high titres of acetylcholine receptor antibodies (AChR Ab) suggestive of MG were found. He was treated accordingly with a very good response.

Matched MeSH terms: Pyridostigmine Bromide/therapeutic use

Myasthenia gravis and a rare complication of chemotherapy

Ng CV

Med J Aust, 2005 Feb 07;182(3):120.

PMID: 15698357

We describe a patient with myasthenia gravis and thymoma who developed recurrent severe myasthenic crises associated with the use of combination chemotherapy.

Matched MeSH terms: Pyridostigmine Bromide/administration & dosage

Fulltext An association of myasthenia gravis with Hashimoto's thyroiditis in a patient with a multinodular goitre

Mohamed N, Mohd Zin F, Mohd Yusoff SS

Malays Fam Physician, 2017;12(2):29-31.

PMID: 29423128

Introduction: The association of myasthenia gravis (MG) with other autoimmune diseases including autoimmune thyroid disease (ATD) is well recognised, although rare. The occurrence of both diseases can occur in two ways: either disease preceding the other, or concurrently. The presentation of MG in association with ATD can range from ocular to generalised disease.

Case Summary: A 26-year-old Malay female with persistent hyperthyroidism secondary to Hashimoto's thyroiditis in multinodular goitre was diagnosed with generalised MG after 2 years. She presented with right eye ptosis (ocular) and difficulty in swallowing and chewing (bulbar). The diagnosis of MG was confirmed by fatigability testing, electromyography and the presence of AChR antibodies. Her symptoms showed improvement with pyridostigmine (Mestinon) 60 mg 6-hourly. Her antithyroid drug was tapered down according to her thyroid function test. Throughout a year of follow-ups, her hyperthyroidism and fatigability symptoms improved with treatment. She was later counselled for total thyroidectomy and thymectomy.

Conclusion: Myasthenia gravis and hyperthyroidism may present with similar symptoms such as dysphagia due to neuromuscular weakness or fatigue. When the diseases occur together, one of the diagnoses may be missed. Therefore, the occurrence of new symptoms in a patient with underlying ATD should should trigger the early identification of other autoimmune diseases by primary care doctors.

Matched MeSH terms: Pyridostigmine Bromide

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