Pseudolymphomas of the

Borrelia Lymphocytoma

Pseudolymphomas of the skin are benign lymphocytic proliferations that simulate cutaneous malignant lymphomas clinically and or histopathologically 1-5 . The term pseu-dolymphoma is not specific but is merely descriptive as it encompasses reactive skin conditions with different aetiologies, pathogeneses, clinicopathological presentations and behaviours. Cutaneous pseudolymphomas are traditionally divided into T- and B-cell pseudolymphomas according to the histopathological and...

Persistent nodular arthropod bite reactions

Nodular Scabies

The most typical example of this group of lymphomatoid infiltrates is nodular scabies but many other arthropods can induce skin lesions that may simulate malignant lymphoma histopathologically. Clinically, in nodular scabies, elevated round or oval bright reddish papules and nodules occur most frequently on the genitalia, elbows and in the axillae (Fig. 20.34). The lesions are found in approximately 7 of patients with scabies. The nodules are very pruritic and may persist for many months. The...

Lichenoid lymphomatoid keratosis

Dense Inflamatory Cell Infiltrate

Fig. 20.8 Solitary T-cell pseudolymphoma. Dense band-like infiltrate in the upper dermis. Fig. 20.8 Solitary T-cell pseudolymphoma. Dense band-like infiltrate in the upper dermis. tion see p. 165). They represent distinct entities, which have been referred to as 'solitary T-cell pseudolymphoma' in the literature 36,37 . These lesions are frequently located on the breasts of adult women (Fig. 20.7). Histology reveals a band-like infiltrate in an expanded papillary dermis, sometimes with...