Two side-by-side clinical photographs labeled A and B demonstrate a bedside ice pack test in a patient with suspected myasthenia gravis. Image A (Before Ice Pack Test) shows significant left-sided blepharoptosis, with the upper eyelid drooping to partially cover the pupil (indicated by a black arrow). Image B (After Ice Pack Test) demonstrates a positive result, where the left eyelid shows temporary elevation and resolution of ptosis (indicated by a blue arrow) following local cooling. The patient is shown in a clinical setting wearing a blue surgical cap, a nasal cannula for oxygen delivery, and an adhesive nasal strip for stabilization. This comparative series illustrates the clinical utility of the ice pack test, which inhibits acetylcholinesterase activity at the neuromuscular junction to temporarily improve muscle strength in myasthenic patients. The images highlight key diagnostic physical exam findings in neuro-ophthalmology and neuromuscular medicine.

This set of six clinical photographs (A-F) illustrates the variability of the ice test in a patient with myasthenia gravis presenting with bilateral asymmetric ptosis. The images are arranged in pairs representing three different days, showing the patient's eyes before and after a 2-minute ice application. Frames A, C, and E show baseline bilateral blepharoptosis with varying degrees of upper eyelid drooping obscuring the pupil and iris. Frames B, D, and F show the post-intervention state. The series demonstrates three distinct clinical responses in the right eye: (B) a negative result with no significant change, (D) an equivocal result showing subtle 1.0 mm elevation, and (F) a positive result with a marked 2.0 mm increase in the palpebral fissure. This comparison serves as an educational tool for neurology and ophthalmology students to understand the fluctuating nature of neuromuscular junction disorders and the diagnostic utility (and inconsistency) of the ice pack test, which temporarily improves ptosis by inhibiting acetylcholinesterase at the motor endplate.

This diagnostic image set consists of three brain MRI panels (A, B, and C) demonstrating classic radiological findings of Wernicke's encephalopathy. Panel A is a coronal T2-weighted/FLAIR image showing symmetrical hyperintense signals in the periventricular region surrounding the third ventricle, highlighted by a vertical arrow. Panels B and C are axial Diffusion-Weighted Imaging (DWI) sequences demonstrating restricted diffusion characterized by high signal intensity within the bilateral basal ganglia and midline structures. Black arrows in the axial views indicate the symmetrical involvement of deep gray matter nuclei. These imaging findings are pathognomonic for thiamine deficiency-related neurotoxicity when correlated with clinical presentation. The modality demonstrates the importance of T2 and DWI sequences in identifying acute metabolic encephalopathy. This material is suitable for advanced medical education in neurology and neuroradiology, focusing on the identification of non-alcoholic Wernicke's encephalopathy manifestations.

This diagnostic image consists of three axial MRI slices of the brain using Fluid Attenuated Inversion Recovery (FLAIR) sequences, illustrating the classic neuroimaging findings of acute Wernicke encephalopathy. The images demonstrate bilateral, symmetrical hyperintense (bright) signals in specific anatomical regions characteristic of thiamine deficiency. Key structures labeled include the mammillary bodies in the posterior hypothalamus and the colliculi in the midbrain. Higher slices show prominent hyperintensities within the periventricular gray matter surrounding the third ventricle, as well as involvement of the fornix and the medial aspects of the thalamus. These findings represent edema or glial changes associated with the acute clinical manifestation of the disease. The primary educational focus is to teach the radiological signature of Wernicke encephalopathy in the context of chronic alcoholism and nutritional deficiency, emphasizing the typical distribution of lesions in midline brain structures.