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Open access

Yoko Olmedilla, Shoaib Khan, Victoria Young, Robin Joseph, Simon Cudlip, Olaf Ansgorge, Ashley Grossman and Aparna Pal

Summary

A 21 year-old woman was found to have a pituitary macroadenoma following an episode of haemophilus meningitis. Biochemical TSH and GH excess was noted, although with no clear clinical correlates. She was treated with a somatostatin analogue (SSA), which restored the euthyroid state and controlled GH hypersecretion, but she re-presented with a further episode of cerebrospinal fluid (CSF) leak and recurrent meningitis. Histology following transsphenoidal adenomectomy revealed a Pit-1 lineage plurihormonal adenoma expressing GH, TSH and PRL. Such plurihormonal pituitary tumours are uncommon and even more unusual to present with spontaneous bacterial meningitis. The second episode of CSF leak and meningitis appears to have been due to SSA therapy-induced tumour shrinkage, which is not a well-described phenomenon in the literature for this type of tumour.

Learning points:

  • Pit-1 lineage GH/TSH/PRL-expressing plurihormonal pituitary adenomas are uncommon. Moreover, this case is unique as the patient first presented with bacterial meningitis.

  • Inmunohistochemical plurihormonality of pituitary adenomas does not necessarily correlate with biochemical and clinical features of hormonal hypersecretion.

  • Given that plurihormonal Pit-1 lineage adenomas may behave more aggressively than classical pituitary adenomas, accurate pathological characterization of these tumours has an increasing prognostic relevance.

  • Although unusual, a CSF leak and meningitis may be precipitated by SSA therapy of a pituitary macroadenoma via tumour shrinkage.

Open access

Leanne Hunt, Barney Harrison, Matthew Bull, Tim Stephenson and Amit Allahabadia

Summary

This case report reviews the rare condition of Riedel’s thyroiditis via a patient case. The report highlights the difficulties that one may encounter when managing such a case in regards to patient symptoms, side effects of medications and the relapsing nature of the condition. The case report also highlights novel treatment in the treatment of Riedel’s thyroiditis, rituximab, how this works and the resolution of symptoms that we have achieved with our patient on this treatment.

Learning points:

  • Riedel’s thyroiditis is characterised by chronic inflammation, which causes dense fibrosis in the thyroid gland.

  • Riedel’s thyroiditis can present with neck pain, dysphagia and dyspnoea with a firm, non-tender mass found on examination.

  • Riedel’s thyroiditis is part of the IgG4-related systemic disorders.

  • Rituximab is a monoclonal antibody that works against the protein CD20.

Open access

Alexandra Rose Pain, Josh Pomroy and Andrea Benjamin

Summary

Hamman’s syndrome (spontaneous subcutaneous emphysema and pneumomediastinum) is a rare complication of diabetic ketoacidosis (DKA), with a multifactorial etiology. Awareness of this syndrome is important: it is likely underdiagnosed as the main symptom of shortness of breath is often attributed to Kussmaul’s breathing and the findings on chest radiograph can be subtle and easily missed. It is also important to be aware of and consider Boerhaave’s syndrome as a differential diagnosis, a more serious condition with a 40% mortality rate when diagnosis is delayed. We present a case of pneumomediastinum, pneumopericardium, epidural emphysema and subcutaneous emphysema complicating DKA in an eighteen-year-old patient. We hope that increasing awareness of Hamman’s syndrome, and how to distinguish it from Boerhaave’s syndrome, will lead to better recognition and management of these syndromes in patients with diabetic ketoacidosis.

Learning points:

  • Hamman’s syndrome (spontaneous subcutaneous emphysema and pneumomediastinum) is a rare complication of DKA.

  • Presentation may be with chest or neck pain and shortness of breath, and signs are subcutaneous emphysema and Hamman’s sign – a precordial crunching or popping sound during systole.

  • Boerhaave’s syndrome should be considered as a differential diagnosis, especially in cases with severe vomiting.

  • The diagnosis of pneumomediastinum is made on chest radiograph, but a CT thorax with water-soluble oral contrast looking for contrast leak may be required if there is high clinical suspicion of Boerrhave’s syndrome.

  • Hamman’s syndrome has an excellent prognosis, self-resolving with the correction of the ketoacidosis in all published cases in the literature.

Open access

Marta Araujo Castro, Ainhoa Abad López, Luz Martín Fragueiro and Nuria Palacios García

Summary

The 85% of cases of primary hyperparathyroidism (PHPT) are due to parathyroid adenomas (PA) and less than 1% to parathyroid carcinomas (PC). The PA usually measure <2 cm, weigh <1 g and generate a mild PHPT, whereas the PC usually exceeds these dimensions and are associated with a severe PHPT. However, giant PA (GPA), which is defined as those larger than 3 g, has been documented. Those may be associated with very high levels of PTH and calcium. In these cases, their differentiation before and after surgery with PC is very difficult. We present a case of severe PHPT associated with a large parathyroid lesion, and we discuss the differential aspects between the GPA and PC.

Learning points:

  • In parathyroid lesions larger than 2 cm, the differential diagnosis between GPA and PC should be considered.

  • Pre and postsurgical differentiation between GPA and PC is difficult; however, there are clinical, analytical and radiographic characteristics that may be useful.

  • The depth/width ratio larger or smaller than 1 seems to be the most discriminatory ultrasound parameter for the differential diagnosis.

  • Loss of staining for parafibromin has a specificity of 99% for the diagnosis of PC.

  • The simultaneous presence of several histological characteristics, according to the classification of Schantz and Castleman, is frequent in PC and rare in GPA.

Open access

Mahmud Abo Salook, Carlos Benbassat, Yulia Strenov and Amit Tirosh

Summary

A 55-year-old male, with a positive medical history for hypothyroidism, treated with stable doses for years was admitted with subacute thyroiditis and a feeling of pain and pressure in the neck. Laboratory tests showed decrease in TSH levels, elevated erythrocyte sedimentation rate, and very high antithyroid antibodies. Owing to enlarging goiter and exacerbation in the patient's complaints, he was operated with excision of a fibrotic and enlarged thyroid lobe. Elevated IgG4 plasma levels and high IgG4/IgG plasma cell ratio on immunohistochemistry led to the diagnosis of IgG4-mediated thyroiditis. We concluded that IgG4-thyroiditis and IgG4-related disease should be considered in all patients with an aggressive form of Hashimoto's thyroiditis.

Learning points

  • IgG4-related disease is a systemic disease that includes several syndromes; IgG4-related thyroiditis is one among them.

  • IgG4-thyroiditis should be considered in all patients with an aggressive form of Hashimoto's thyroiditis.

  • Patients with suspected IgG4-thyroiditis should have blood tested for IgG4/IgG ratio and appropriate immunohistochemical staining if possible.