Carpal tunnel syndrome and oral contraceptive drugs: risk or protective factor?

Hormone replacement therapy in women and risk of carpal tunnel syndrome: a systematic review and metaanalysis

BACKGROUND

Carpal tunnel syndrome (CTS) is the most common entrapment mononeuropathy. Menopausal status and/or estrogen level may play a role in CTS. The evidence regarding the association between hormone replacement therapy (HRT) in postmenopausal women and CTS is still conflicting. This meta-analysis aimed to investigate the association between carpal tunnel syndrome (CTS) and women using hormone replacement therapy (HRT).

METHODS

A search was conducted in the PubMed/Medline, Scopus, Embase, and Cochrane databases, from their inception through July 2022. Studies which reported on the association between any type of HRT use and the risk of developing CTS in postmenopausal women compared to a control group were included. Studies which did not include a control group were excluded. Of the 1573 articles extracted from database searches, seven studies involving 270,764 women were included of which 10,746 had CTS. The association between CTS and HRT use was evaluated using the pooled odds ratio (OR) with a 95% confidence interval (CI) under random-effects modelling. Risk of bias in each study was assessed using the Newcastle-Ottawa Scale (NOS) and version 2 of the Cochrane tool for assessing risk of bias in randomized trials (RoB 2).

RESULTS

HRT use showed no statistically significant association with a higher risk of CTS with pooled odds ratio (OR) 1.49, 95% confidence interval (CI) 0.99-2.23, and p = 0.06, although high heterogeneity among the studies was observed (I² 97.0%, Q-test p-value < 0.001). Subgroup analysis of groups in non-randomized controlled studies showed a significantly increased risk of CTS, while groups in randomized controlled studies showed a decreased risk of CTS (pooled OR 1.87, 95% CI 1.24-2.83 versus pooled OR 0.79, 95% CI 0.69-0.92, respectively) with the p-value of group difference < 0.001. The risk of bias in most of the included studies was estimated to be low.

CONCLUSIONS

This meta-analysis supports the safety of using HRT in postmenopausal women with potential risk factors for CTS.

LEVEL OF EVIDENCE

I, Prognosis.

REGISTRATION

INPLASY (202280018).

Carpal tunnel syndrome ascribed to low-dose combined oral contraceptive pills

Carpal tunnel syndrome (CTS) is the most prevalent compressive focal mononeuropathy brought on by median nerve compression, and common manifestations include pain in the wrist joint, decreased sensations along the distribution of the median nerve, a reduction in two-point discrimination, nighttime awakening, and, in more advanced stages, thenar muscle wasting and weakening. CTS, although common, yet underreported adverse effects of oral contraceptives. We report a case of 21-year-old female who developed CTS after using low-dose combined oral contraceptive pills for irregular cycles with polycystic ovary disease.

Anterior Cutaneous Nerve Entrapment Syndrome Possibly Triggered by Oral Contraceptives

We herein report a teenage girl who had been taking oral contraceptive pills for three months and complained of left lower abdominal pain that had continued for two months. A physical examination indicated anterior cutaneous nerve entrapment syndrome (ACNES), although no abnormality was found in various biochemical and imaging examinations. The pain was only transiently ameliorated by trigger-point injection, and neurectomy surgery was eventually effective. Sex steroids can be involved in the progress of local tissue edema causing ACNES. ACNES should be considered in cases of abdominal pain in patients taking oral contraceptives.

Carpal tunnel syndrome and metabolic syndrome

Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy. Many factors such as diabetes mellitus, hypothyroidism, hormonal replacement therapy, corticosteroid use, rheumatoid arthritis and wrist fractures may cause CTS. Metabolic syndrome includes abdominal obesity, dyslipidemia, hyperglycemia, and hypertension that may cause CTS. In this study, we aimed to evaluate the relation between CTS and metabolic syndrome. We studied 107 (96 female and 11 male) right-handed patients who had a clinical and electrophysiologically confirmed diagnosis of CTS. We then divided the patients into two groups (patients with and without metabolic syndrome) according to the criteria of ATP III definition. Eighty (75%) of the patients with CTS had metabolic syndrome. Among the 80 patients with metabolic syndrome, CTS was found in 150 hands (43 mild, 58 moderate and 49 severe cases). Among the 27 patients without metabolic syndrome, CTS was found in 43 hands (27 mild, 14 moderate and 2 severe cases). The electrophysiological parameters (median nerve distal motor latency, median nerve motor amplitude, median nerve motor conduction velocity, median nerve sensory onset latency, median nerve sensory amplitude and median nerve sensory conduction velocity) were worse in patients with metabolic syndrome (P < 0.05). In conclusion, metabolic syndrome was found to be three times more common in patients with CTS and CTS was more severe in patients with metabolic syndrome when compared with those without metabolic syndrome.