Sinus<unk> , a common feature in lymph node biopsies, is characterized by dilated sinuses containing variable numbers of histiocytes.<unk>  is a rare disease, thus its diagnosis may be challenging. A variety of tests may be used, including: * Imaging * CT scans of various organs such as lung, heart and kidneys. * MRI of the brain, pituitary gland, heart, among other organs. * Skeletal survey is useful in children * Ultrasound of liver and spleen * Blood tests: measure cell counts and inflammation * Breathing tests * Tissue biopsy and molecular testing to detect mutations
Histiocytosis
Non-Hodgkin lymphoma
Angiolymphoid hyperplasia with eosinophilia
Reticulohistiocytoma
Progressive nodular histiocytosis
Intravascular lymphomas
B-cell lymphoma
Tuberculous lymphadenitis