Cutaneous infiltrates – lymphomatous and leukemic

Persistent chemosis and periorbital edema

“…Follicular center cell lymphoma is composed of medium to larger cells with cleaved nuclei. It is CD20 positive and may coexpress CD10 or Bcl‐2 but is negative for CD5 and CD23 …”

Pilomatrixoma-like testicular tumour without teratomatous elements

“…We saw neither basaloid cells nor necrosis in histopathological examination of sections of the complete specimen from our case. Also, it should be remembered that shadow cell differentiation can occur in some visceral malignancies, such as endometrial and colon adenocarcinomas with squamous cell differentiation 6. Both of these tumours appear morphologically as adenocarcinomas, and their epithelial components show characteristic features of structural and cellular atypia, as well as frequent mitoses, necrosis and invasion.…”

Cutaneous Lymphoid Hyperplasia (Pseudolymphoma) in a Tattoo After Far Infrared Light

“…Medications, tattoo dyes, arthropod venom, Borrelia infection, vaccines, and ultraviolet light have been reported causes 8 . This histology can resemble that of certain indolent lymphomas, specifically follicular center lymphoma and marginal zone lymphoma 3,9–11 . Immunohistochemistry and gene rearrangement studies now aid in the correct classification of these two entities 7…”

“…8 This histology can resemble that of certain indolent lymphomas, specifically follicular center lymphoma and marginal zone lymphoma. 3,[9][10][11] Immunohistochemistry and gene rearrangement studies now aid in the correct classification of these two entities. 7 Although pseudolymphoma is considered a benign entity, it can transform to a lymphoma; this risk is higher if clonal rearrangement is preexisting.…”

“…7 Although pseudolymphoma is considered a benign entity, it can transform to a lymphoma; this risk is higher if clonal rearrangement is preexisting. [9][10][11][12][13][14] Sangueza and colleagues reported a case of pseudolymphoma in a tattoo that transformed into a lymphoma. 15 Although the initial histology was benign, rearranged bands were noted on immunophoresis.…”