A patient had seven irregular hyperpigmented macules on the trunk and multiple small hyperpigmented macules in the axillae and groins since early childhood. There were no other skin lesions. Which is the most likely investigation to support the diagnosis ?
Seven hyper pigmented macules on trunk with multiple hyperpigmented macules in axilla (freckling) point towards the diagnosis of neurofibromatosis. So, for supporting the diagnosis we need to see iris hamartomas (lish nodules) by slit lamp examination.
Slit lamp examination of eye
Measurement of intraocular tension
Examination of fundus
Retinal artery angiography