Penile Kaposi Sarcoma as an initial manifestation of HIV infection: A case report and literature review

Cutaneous Kaposi Sarcoma as a Presenting Sign of HIV: A Case Report

We present the case of a 68-year-old man with no known risk factors for HIV infection who developed a new, rapidly growing lesion on the left medial foot. The lesion was biopsied and found to be consistent with Kaposi sarcoma (KS). He subsequently tested positive for HIV and developed cellulitis of the left lower extremity. Treatment involved empiric antibiotics, surgical excision of the lesion, radiation therapy, and antiretroviral therapy. The development of KS with no known history of HIV/AIDS is uncommon, with only a few reported cases. We provide a summary of 18 cases in the current literature of cutaneous KS as an initial presenting sign of HIV/AIDS.

Penile osteosarcoma

Introduction

Extraskeletal osteosarcoma arising in the penis is exceedingly rare and its major differential diagnosis is sarcomatoid carcinoma.

Case presentation

A 19-year-old patient noticed a deep nodule in the dorsal side of the penis 2 years before this presentation. No skin lesions were noted until recent ulceration. In both biopsy and penectomy specimen, atypical mononuclear cells were diffusely positive for SATB2 (a marker of osteoblastic differentiation), CD99 and vimentin. These cells were negative for pan-keratin, SOX10, S100, EMA, GATA3 and CD68 was expressed only in multinucleated giant (osteoclast-like) cells. Few areas suggestive of osteoid production were noted.

Conclusion

In high-grade sarcomas, including in the penis, SATB2 staining may be useful to identify extraskeletal osteosarcoma.