<unk>  is diagnosed by a lymph node biopsy. It has a characteristic pattern of histomorphology and immunohistochemical staining: *Paracortical histiocytosis *Melanin-laden macrophages *Eosinophils *Plasma cells (medulla of lymph node) Differential diagnosis * Cutaneous T cell lymphoma *Hodgkin's lymphoma *Melanoma
Dermatopathic lymphadenopathy
Tick-borne lymphadenopathy
Tuberculous lymphadenitis
Caseous lymphadenitis
Skin manifestations of sarcoidosis
Cutaneous T cell lymphoma
Mycobacterial cervical lymphadenitis
Cutaneous lymphoma