An unusually large onychomatricoma.

Onychomatricoma is a rare benign tumour of the nail matrix first described in 1992, and since then, no more than 80 cases have been reported. Despite distinct clinical characteristics, it is frequently misdiagnosed as onychomycosis partly due to remaining an unknown entity. The authors present the case of a patient with a 30-year history of nail abnormalities with more recent growth to alarming dimensions.

Yellow fever vaccine-associated neurological disease, a suspicious case.

A 70-year-old man with known cardiovascular risk factors, presented with acute onset expression aphasia, agraphia, dyscalculia, right-left disorientation and finger agnosia, without fever or meningeal signs. Stroke was thought to be the cause, but cerebrovascular disease investigation was negative. Interviewing the family revealed he had undergone yellow fever vaccination 18 days before.

Wunderlich's syndrome as a manifestation of polyarteritis nodosa.

Wunderlich syndrome is a rare clinical entity characterised by spontaneous renal haemorrhage that can be life-threatening and requires emergency attention. The most frequent aetiologies are renal tumours and vascular diseases. The authors report a case of a patient admitted with hypovolaemic shock due to a retroperitoneal haematoma in the context of polyarteritis nodosa (PAN).

Adult-onset Still's disease presenting as myopericarditis.

A 24-year-old man presented to the emergency department with fever, maculopapular rash, myalgia and polyarthralgia, thoracic pain and dry cough, which had been present for 24 h. At the time of observation he had high fever (39°C), maculopapular rash on the torso, arms and legs proximally, axillary adenopathies and pharyngitis. Laboratorial data showed elevated inflammation markers (leukocytosis, C reactive protein of 44 mg/dL, erythrocyte sedimentation rate of 120 mm), elevated transaminases, lactate dehydrogenase, ferritin levels (>2000 ng/mL) and rising troponin.