Novel treatment of blastic plasmacytoid dendritic cell neoplasm: A case report.

RATIONALE: Blastic plasmacytoid dendritic cell neoplasm (BPDCN), derived from precursors of plasmacytoid dendritic cells, is a rare and aggressive malignancy with frequent cutaneous involvement. Although cutaneous lesions are often chemosensitive, BPDCN portends a poor prognosis as most patients relapse after developing drug resistance. PATIENT CONCERNS: We report a case of a 65-year-old man who presented with a rapidly enlarging hyperpigmented plaque on his shoulder with subsequent similarly appearing macules and plaques on his chest, back, and neck. DIAGNOSIS: Skin biopsy revealed a dense adnexocentric dermal infiltrate of immature blastoid cells without epidermal involvement. The infiltrate was immunoreactive for CD4, CD56, CD123, and Bcl-2, but negative for CD3, CD8, CD30, MPO, EBER, and ISH. The patient was diagnosed with BPDCN based on these cell markers. INTERVENTION: Bone marrow biopsy and radiologic work-up showed no evidence of extracutaneous involvement. The patient attained partial remission after undergoing 2 rounds of cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP regimen) before autologous stem cell transplantation, however, he quickly relapsed and developed new cutaneous lesions. OUTCOMES: The patient was treated with venetoclax, a Bcl-2 inhibitor, and exhibits complete resolution of prior skin findings and continues to remain free of new cutaneous lesions 10 months posttreatment initiation with venetoclax. LESSONS: Herein, we present a case that supports the use of venetoclax, a Bcl-2 inhibitor, in the off-label treatment of BPDCN with Bcl-2 overexpression. Only 1 prior case has reported the off-label use of venetoclax for the treatment of BPDCN. This case highlights a novel therapeutic option for BPDCN patients unresponsive to traditional treatment.

Compliance with pregnancy prevention measures during isotretinoin therapy.

BACKGROUND: Approximately 150 women annually become pregnant while taking isotretinoin despite participation in the iPLEDGE program. Noncompliance with the requirement to be abstinent or use 2 contraceptive methods may be a contributing factor. OBJECTIVE: We sought to determine the degree of adherence to contraception or abstinence among women taking isotretinoin. METHODS: We conducted an anonymous survey of women of childbearing potential taking isotretinoin for at least 2 months. RESULTS: Among 75 participants, 21 (28%) chose abstinence as their primary means of pregnancy prevention, of whom 4 (19%) were sexually active during treatment. The most commonly chosen contraceptive methods among the 39 women who were sexually active were condoms (35, 90%) and oral contraceptive pills (18, 46%). Twelve women (31%) admitted to having intercourse at least once using 1 or fewer forms of contraception; 10 failed to use condoms, and 1 reported completely unprotected intercourse. Among sexually active oral contraceptive pill users, 7 (39%) reported missing 1 or more pills in the previous month. LIMITATIONS: Data were self-reported, thus participants may have inaccurately reported contraception use. CONCLUSIONS: Encouraging the use of highly effective, patient-independent contraception and limiting abstinence to women who have never been sexually active may further reduce the rate of isotretinoin-exposed pregnancies.