Primary cutaneous γδ T‐cell lymphoma (CGD‐TCL) is a rare form of primary cutaneous lymphoma. The histopathological features of CGD‐TCL are still unclear because of its rarity. Here, we report a case of a 77‐year‐old Japanese man who presented with a 9‐month history of erythematous plaques on his left forearm. Skin biopsy specimens revealed the infiltration of atypical medium/large‐sized lymphocytes from the epidermis to the deep dermis. Atypical lymphocytes were positive for CD3, CD5, CD8 and Vδ1, and negative for CD4, CD7, CD56, EBER‐ISH, intracellular antigen‐1, granzyme B and perforin. CD30 was partially expressed. We also reviewed 246 cases of CGD‐TCL from the published work. CD4−CD8− double‐negative cases were 113 of 196 cases (57.6%), followed by CD4−CD8+ cases (52/196, 26.5%). CD5 was expressed in 25.8% of the cases (34/132). At least one cytotoxic molecule marker was expressed in 150 of 160 cases (93.8%). Some cases showed an indolent clinical course, especially in mycosis fungoides‐like CGD‐TCL cases. CD5 positivity and lack of cytotoxic molecule expression could be associated with a better prognosis. In addition, CD30 expression was found in approximately half of CGD‐TCL cases (51/112 cases), suggesting that brentuximab vedotin could be a good treatment option for such patients. Further studies with more cases with detailed clinical and pathological information are necessary to elucidate the etiology and prognostic markers of this entity.

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Raloxifene is a drug used in postmenopausal women with osteoporosis. Although hot flashes are known side effects of raloxifene, to the best of our knowledge, erythema multiforme (EM) minor has not been previously reported. Herein, we report about a 74-year-old woman who developed EM minor after the drug alfacalcidol was changed to raloxifene to treat osteoporosis. Skin biopsy revealed a suspicious eczematous drug reaction. The drug-induced lymphocyte stimulation test showed a positive result. The stimulation index was 2.2, and there were no other suspected drugs. Based on these results, we diagnosed the condition as EM minor caused by raloxifene. The patient’s symptoms disappeared after the use of antihistamine drugs and topical steroids. In conclusion, raloxifene can cause EM minor in rare cases.

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