Hamman’s syndrome by definition is spontaneous pneumomediastinum with the exclusion of thoracic trauma or iatrogenic cause. It is rare and is more common in adolescence male. Amongst the risk factors are underlying lung condition such as asthma and interstitial lung disease, drug inhalation and parturient woman. Patient usually presents with sudden onset of shortness of breath and chest pain with subcutaneous emphysema on examination. The diagnosis is confirmed with chest radiograph. The prognosis of Hamman’s syndrome is excellent. Most cases are self-limiting and resolve spontaneously. However, Hamman’s syndrome is a poorly recognised disease due to its rarity. Therefore, the patient may be subjected to misdiagnosis and treatment. This is a case report of Hamman’s syndrome misdiagnosed and treated as pneumothorax. The objective of this case report is to highlight the importance of differentiating this benign syndrome with life threatening differentials which may have similar clinical presentation. Thus, avoiding unnecessary costly investigation, treatment and invasive procedures.

Puncture injury from sea-urchin stings may lead to a local and systemic inflammatory reaction. We are reporting a case of longitudinal extensive transverse myelitis (LETM), which occurred ten days post-sea-urchin stings, where the patient presented with bilateral lower limb weakness. MRI showed multilevel segment spinal cord T2-weighted hyperintensity. Prompt intravenous methylprednisolone was administered, and the patient had a full recovery. To date, there is no case report of LETM associated with sea-urchin stings. Possible mechanism due to delayed immunological hypersensitivity to sea-urchin venom. This case demonstrates the potential serious neurological sequelae that may be associated with post-sea-urchin sting and the importance of prompt recognition and management in aiding recovery.

Mycoplasma pneumonia is an atypical bacterium that causes mild respiratory tract infections, especially in the upper respiratory system. Mycoplasma pneumoniae infection is infrequently associated with various CNS manifestations such as encephalitis, meningoencephalitis, myelitis, Guillain-Barre syndrome and acute disseminated encephalomyelitis (ADEM). Here we report a rare case of mycoplasma encephalitis in an adult who presented with a first episode of seizure following fever and neck stiffness for one week. Mycoplasma pneumoniae antibody titer was markedly elevated at >1:320 and MRI brain revealed encephalitic changes with a lesion in the splenium. Interestingly, there was no associated respiratory infection and his stay in the hospital was also complicated by SIADH. The patient improved after treatment with a macrolide antibiotic.