Pituitary apoplexy in the aftermath of a SARS-CoV-2 infection: a case series from Amiens University Hospital

Pituitary Apoplexy: a re-appraisal of risk factors and best management strategies in the COVID-19 era

Pituitary apoplexy (PA) is a clinical syndrome caused by acute hemorrhage and/or infarction of the pituitary gland, most commonly in the setting of a pituitary macroadenoma. PA generally presents with severe headache, nausea, vomiting, visual disturbance, and, in more severe cases, altered mental status. Many factors have been attributed to the risk of developing PA, including most recently, numerous reports showcasing an association with COVID-19 infection or vaccination. Initial management of PA includes evaluation and correction of deficient hormones and electrolytes and an assessment if surgical decompression to relieve pressure on optic nerves and other brain structures is needed. While prompt recognition and treatment are crucial to avoid morbidity and mortality, in the modern era, PA is less commonly considered a true neurosurgical emergency requiring immediate (< 24 h) surgical decompression. Traditionally, surgical decompression has been the standard of care for significant mass effects. However, several studies have shown similar outcomes in visual and hormonal recovery with either surgical decompression or conservative medical management. Unfortunately, most evidence on optimal management strategies is limited to retrospective case series, small prospective studies, and one multi-center observational study. This review aims to provide the most up-to-date evidence on the role of COVID-19 in PA and best management strategies.

Hypopituitarism and COVID-19

PURPOSE

This review aims to collect and examine recent research findings regarding hypopituitarism and COVID-19, focusing on the virus's impact on the pituitary gland and the outcomes for infected patients with hormonal deficiencies.

METHODS

Literature review using PubMed (pubmed.ncbi.nlm.nih.gov). The search included the following terms: "COVID19" in combination with "Pituitary" and "Hypopituitarism".

RESULTS

Many studies have aimed to evaluate the function of the pituitary gland in infected patients, revealing variable degrees of deficiencies. The results are very heterogenous mostly because many different tests and hormonal cut-off have been adopted. It is unclear whether primary virus damage or the inflammatory response is responsible for these hormonal alterations. Interestingly, pituitary defects may persist long after the initial infection, possibly contributing to the "Long COVID syndrome". However, data on the recovery of pituitary function and long-term follow-up are not yet available. On the other hand, although findings are not consistent, patients with hypopituitarism may be at a higher risk for COVID-19 infection rate, complications, and mortality.

CONCLUSION

The COVID-19 pandemic presented challenges for endocrinologists. The endocrine system appears to be involved in both the acute phase of infection and the recovery period. Hypopituitarism can be a consequence of SARS-COV-2 infection, and patients with existing hypopituitarism may face higher risks of complications. It is advisable to educate these patients on how to adjust their replacement therapies. Long-term follow-up data on pituitary function after recovery from COVID-19 are needed.

COVID19 infection and vaccination and the risk of pituitary apoplexy: an entangled yarn

PURPOSE

Pituitary apoplexy (PA) has been increasingly reported in association with both infection from and vaccination for COVID19. Our aim was to analyse the available published cases and compare the clinical characteristics in the two groups (infection vs vaccination).

METHODS

We systematically reviewed the published literature for all cases of PA associated with COVID19 infection or vaccination. We also presented two cases managed at our Centre.

RESULTS

Collectively, fortythree cases were analysed. Patients with PA after COVID19 vaccination (n = 7), compared with patients with PA after COVID19 infection (n = 36), were significantly younger (p = 0.009) and had a more abrupt onset of PA (p = 0.022), but showed a milder hormonal involvement (p = 0.008) and a lower rate of persistent hypopituitarism during follow-up (p = 0.001). Patients in the vaccination group did not have clinical risk factors for PA, although this difference did not reach statistical significance.

CONCLUSIONS

PA associated with COVID19 is a rare but clinically significant entity, although pathophysiological details of this association are lacking. Given the significantly different clinical presentation, we could speculate that PA induced by COVID19 vaccination might represent a distinct clinical entity, with different pathophysiological mechanism, compared to PA from COVID19 infection.

Pituitary and SARS CoV-2: An unremitting conundrum

There is increased interest related to the impact of coronavirus disease 19 (COVID-19) on the endocrine system and in particular on the pituitary gland. Over the course of the severe infection with acute respiratory syndrome coronavirus 2 (SARS-CoV-2), there are both acute and delayed effects on the pituitary, related to infection and/or treatment. Hypopituitarism, pituitary apoplexy and hypophysitis have been all reported, as well as arginine vasopressin deficiency (diabetes insipidus) and syndrome of inappropriate antidiuretic hormone secretion. Furthermore, patients with acromegaly, Cushing's disease and hypopituitarism are theoretically at increased risk of complications with COVID-19 and require close monitoring. Evidence regarding pituitary dysfunction in patients with COVID-19 continues to be gathered, as the breadth and depth of knowledge also continues to rapidly evolve. This review summarizes data analysis to date on the possible effects of COVID-19 and COVID-19 vaccination on patients with normal pituitary function and patients with known pituitary pathology. Though clinical systems were significantly affected, it seems there is no overall loss of biochemical control in patients with certain pituitary pathologies.

AVP deficiency (central diabetes insipidus) following immunization with anti-COVID-19 BNT162b2 Comirnaty vaccine in adolescents: A case report

Introduction

The coronavirus disease 19 (COVID-19) pandemic has prompted the development of new vaccines to reduce the morbidity and mortality associated with this disease. Recognition and report of potential adverse effects of these novel vaccines (especially the urgent and life-threatening ones) is therefore essential.

Case presentation

A 16-year-old boy presented to the Paediatric Emergency Department with polyuria, polydipsia and weight loss over the last four months. His past medical history was unremarkable. Onset of symptoms was referred to be few days after first dose of anti-COVID-19 BNT162b2 Comirnaty vaccine and then worsened after the second dose. The physical exam was normal, without neurological abnormalities. Auxological parameters were within normal limits. Daily fluid balance monitoring confirmed polyuria and polydipsia. Biochemistry laboratory analysis and urine culture were normal. Serum osmolality was 297 mOsm/Kg H₂O (285-305), whereas urine osmolality was 80 mOsm/Kg H₂O (100-1100), suggesting diabetes insipidus. Anterior pituitary function was preserved. Since parents refused to give consent to water deprivation test, treatment with Desmopressin was administered and confirmed ex juvantibus diagnosis of AVP deficiency (or central diabetes insipidus). Brain MRI revealed pituitary stalk thickening (4 mm) with contrast enhancement, and loss of posterior pituitary bright spot on T1 weighted imaging. Those signs were consistent with neuroinfundibulohypophysitis. Immunoglobulin levels were normal. Low doses of oral Desmopressin were sufficient to control patient's symptoms, normalizing serum and urinary osmolality values and daily fluid balance at discharge. Brain MRI after 2 months showed stable thicken pituitary stalk and still undetectable posterior pituitary. Due to persistence of polyuria and polydipsia, therapy with Desmopressin was adjusted by increasing dosage and number of daily administrations. Clinical and neuroradiological follow-up is still ongoing.

Conclusion

Hypophysitis is a rare disorder characterized by lymphocytic, granulomatous, plasmacytic, or xanthomatous infiltration of the pituitary gland and stalk. Common manifestations are headache, hypopituitarism, and diabetes insipidus. To date, only time correlation between SARS-CoV-2 infection and development of hypophysitis and subsequent hypopituitarism has been reported. Further studies will be needed to deepen a possible causal link between anti-COVID-19 vaccine and AVP deficiency.

Spot the adenoma after pituitary apoplexy following a SARS-CoV-2 vaccination

Pituitary apoplexy often manifests with a severe headache and is often caused by bleeding in a pituitary adenoma, which is common and often undiagnosed. The pituitary gland is damaged when the tumour suddenly enlarges due to bleeding. Bleeding into the pituitary can block blood supply to the pituitary gland. The larger the tumour, the higher the risk of a future pituitary apoplexy. Since only few cases have been reported, the SARS-CoV-2 vaccine is unlikely to cause pituitary apoplexy. Patients with new-type headache require neurological evaluation and may require cerebral imaging to rule out bleeding, ischemia, venous sinus thrombosis, meningitis, encephalitis, pituitary apoplexy, reversible cerebral vasoconstriction syndrome, dissection, or migraine.

Pituitary apoplexy and COVID-19 vaccination: a case report and literature review

A 50-year-old man was admitted to our hospital for vomit, nausea, diplopia, and headache resistant to analgesic drugs. Symptoms started the day after his third COVID-19 mRNA vaccine (Moderna) whereas SARS-CoV-2 nasal swab was negative. Pituitary MRI showed recent bleeding in macroadenoma, consistent with pituitary apoplexy. Adverse Drug Reaction was reported to AIFA (Italian Medicines Agency).A stress dexamethasone dose was administered due to the risk of adrenal insufficiency and to reduce oedema. Biochemistry showed secondary hypogonadism; inflammatory markers were elevated as well as white blood cells count, fibrinogen and D-dimer. Pituitary tumour transsphenoidal resection was performed and pathology report was consistent with pituitary adenoma with focal haemorrhage and necrosis; we found immunohistochemical evidence for SARS-CoV-2 proteins next to pituitary capillaries, in the presence of an evident lymphocyte infiltrate.Few cases of pituitary apoplexy after COVID-19 vaccination and infection have been reported. Several hypotheses have been suggested to explain this clinical picture, including cross-reactivity between SARS-CoV-2 and pituitary proteins, COVID-19-associated coagulopathy, infection-driven acutely increased pituitary blood demand, anti-Platelet Factor 4/heparin antibodies development after vaccine administration. Ours is the first case of SARS-CoV-2 evidence in pituitary tissue, suggesting that endothelial infection of pituitary capillaries could be present before vaccination, possibly due to a previous asymptomatic SARS-CoV-2 infection. Our case underlines that SARS-CoV-2 can associate with apoplexy by penetrating the central nervous system, even in cases of negative nasal swab. Patients with pituitary tumours may develop pituitary apoplexy after exposure to SARS-CoV-2, therefore clinicians should be aware of this risk.