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​Symptoms and Signs – Differential Diagnosis of Cherry red spot
metachromatic leukodystrophy
Lysosomal storage diseases: sialidosis, Tay-Sachs disease, Niemann-Pick disease,
CO poisoning
Central retinal artery occlusion (thrombosis, embolus, spasm, giant cell arteritis)
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​Symptoms and Signs – Differential Diagnosis of Chest pain
Cardiac large vessels: angina pectoris, myocardial infarction, pericarditis, aortic
dissection, rupture of thoracic aortic aneurysm, bleeding into an atheroma
Respiratory: pulmonary embolism, pneumothorax, pneumonia, connective tissue
diseases (e.g. SLE)
Gastrointestinal: reflux oesophagitis, oesophageal spasm, hiatus hernia, peptic
ulcer, pancreatitis
Musculoskeletal: Teitze's syndrome (costochondritis), fractured rib, Bornholm's
disease (Coxackie B virus infection, rare)
Neurological: herpes zoster, nerve root compression
Pleuritic chest pain
Pulmonary embolism
Pneumothorax
Pneumonia
Pericarditis
Connective tissue disease
Malignancy involving pleura, pathology under the diaphragm
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​Symptoms and Signs – Differential Diagnosis of Coin lesions on Chest X – Ray 
Tumours: bronchial carcinoma, metastatic deposit, e.g. breast cancer, renal cell
carcinoma, hamartoma, adenoma, fibroma
Infection: pneumonia, TB, abscess, hydatid cyst
Infarction
Encysted pleual effusion
Rheumatoid nodule
Vasculitides (e.g. Wegener's granulomatosis)
AV malformation
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​Symptoms and Signs – Differential Diagnosis of  Reticulonodular shadows
Pulmonary fibrosis:
Cryptogenic fibrosing alveolitis
Connective tissue diseases: scleroderma, SLE, sarcoidosis, rheumatoid arthritis,
ankylosing spondylitis
Drugs (amiodarone, busulphan, bleomycin, nitrofurantoin), radiation
Extrinsic allergic alveolitis (e.g. farmers' lung, bird fancier's lung, malt worker's
lung)
Pneumoconioses (coal workers' pneumoconiosis, asbestosis, silicosis, berylliosis)
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​Symptoms and Signs – Differential Diagnosis of Reticulonodular shadows {classified according to the lung zones in which they commonly occur)
Upper zone: allergic bronchopulmoary aspergillosis, radiation, extrinsic allergic
alveolitis, ankylosing spondylitis, sarcoidosis, TB (commonest)
Middle zone: sarcoidosis
Lower zone: cryptogenic fibrosing alveolitis, drugs, asbestosis, rheumatoid
arthritis, scleroderma
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Kembara Xtra 

Facts about medicine and its subtopic such as anatomy, physiology, biochemistry, pharmacology, medicine, pediatrics, psychiatry, obstetrics and gynecology and surgery.