Solitary nodule on the back: A diagnostic challenge on cytology

Lymphocytoma cutis (LC), also termed as cutaneous lymphoid hyperplasia or Spiegler-Fendt sarcoid, results from various antigenic stimuli [1-4]. This entity is basically considered as a pseudolymphoma or collection of reactive polymorphic lymphoid cells where there is an accumulation of lymphocytes underneath the skin, thereby mimicking cutaneous lymphoma on histopathology [3-5]. Hence, it becomes important to establish the polymorphic nature of the lymphoid cells through immunohistochemistry (IHC) in these lesions. Here, we describe the case of a 49-year-old-female patient who presented with a solitary nodular swelling at the back and was finally diagnosed with LC based on the histopathological and IHC evaluation. This diagnosis is of utmost importance keeping in view the management and prognosis of the patient.