Hidden in Plain Sight: Systemic Mastocytosis Manifesting as Isolated Hepatosplenomegaly in the Absence of Cutaneous and Classical Manifestations—A Case Report and Literature Review. - Sadam Zeb, Muhammad; Mian, Ubaid Ullah; Khan, Kashif; Gulalay, Aiman; Hameed, Alishba; Malook, Alyan; Saeed, Essam; Khan, Suleman; Mujtaba, Muhammad; Kamil, Kamil Ahmad (Clinical Case Reports, 2026)