<prompt> A patient presented with BL hilar lymphadenopathy with negative Mantoux test. Diagnosis is: PGI Dec 2007Erythema nodosumSarcoidosisHepatitisTB  <response>: Ans.: B Sarcoidosis Bilateral hilar fymphadenopathy with negative montaux test is the characteristic of sarcoidosis-Erythema nodosum, Hepatitis; uveitits may be the part of sarcoidosisA positive gallium scan can support the diagnosis if increased activity is noted in the parotids and lacrimal glands Panda sign or in the right par a tracheal and left hilar area lam bda signThe Kviem-Siltzbach procedure is a specific diagnostic test for sarcoidosisTable : Frequency of Common Organ Involvement and Lifetime Risk Presentation Follow-up, cLungQ9594Skin2443Eye1229Extrathoracic lymph node1516Liver1214Spleen78Neurologic516Cardiac23 