Re-irradiation of a Classic Kaposi's Sarcoma Using Volumetric Modulated Arc Therapy.

A black male in his 60s diagnosed with classic Kaposi's sarcoma presented with multiple cutaneous nodules and edema of the right foot and lower leg. He was initially treated with alitretinoin 1% topical treatment. However, 16 months after treatment with the alitretinoin, the skin lesions progressed, and he subsequently underwent a course of radiation therapy to a total dose of 2000 centigrays (cGy) in five fractions to his right foot and lower extremities. Approximately 1.5 years after the radiation therapy was completed, multiple new lesions developed on the right foot and distal lower leg. He then underwent a course of re-irradiation to this area using volumetric modulated arc therapy (VMAT) to a total dose of 3300 cGy in 11 fractions. At a four-week follow-up visit, the skin lesions had completely resolved; however, the patient experienced mild edema and tenderness of the right foot and lower leg. Although long-term outcomes need to be followed, re-irradiation showed positive short-term outcomes for classic Kaposi's sarcoma.

Bleeding Mystery Unveiled: A Case of Acquired Hemophilia A in the Shadow of Multiple Myeloma.

This case report is of a 50-year-old woman who had a working diagnosis of von Willebrand disease (vWD) due to a history of bleeding complications and continued to experience recurrent bleeding incidents and hematoma. A workup revealed multiple lytic lesions, and a bone marrow biopsy yielded the diagnosis of multiple myeloma. After stem cell transplantation, the patient's factor VIII levels normalized, supporting acquired factor VIII deficiency due to an autoimmune phenomenon. This case highlights the rare occurrence of acquired factor VIII deficiency secondary to multiple myeloma. It also emphasizes the importance of considering secondary causes in patients with a working diagnosis of vWD and recurrent bleeding incidents.

Sinonasal Teratocarcinosarcoma: A Rare and Highly Aggressive Neoplasm.

Sinonasal teratocarcinosarcomas (SNTCSs) are malignant and highly aggressive neoplasms arising in the nasal cavity and paranasal sinuses with extension into surrounding structures and intracranial extension in few instances. They are commonly found in males (7-8 times more than in females). They pose difficulty in diagnosis due to their diverse histology. Ideal treatment modalities have not been devised yet due to the rare and highly aggressive nature of SNTCSs as shown in this case report. A 29-year-old Asian male was initially misdiagnosed on biopsy. Surgical debulking was performed initially which showed SNTCSs with radiological evidence of residual disease for which gross tumor clearance was done. He presented within a short span of a month, post re-resection with gross local recurrence. Urgent palliative radiotherapy was planned and started but unfortunately, he developed pulmonary and hepatic metastasis during radiation therapy and was commenced on palliative care only due to significant deterioration of performance status. Treatment of SNTCSs is often delayed due to their difficulty in diagnosis. Its highly aggressive nature prompts an urgent and aggressive treatment approach with adjuvant chemoradiation. Any type of adjuvant therapy is better than surgical resection only given its timely administration and close surveillance.

Curative Intent Radiation for Anal Cancer in Pelvic Kidney Transplant: A Case Report With an Eight-Year Follow-Up.

The incidence of malignancies seen after solid organ transplant is increasing, and oncologists are seeing more patients with transplanted organs. In this case report, we present how pelvic radiotherapy can be safely administered in a patient with a transplanted kidney by conducting a comprehensive chart review and analyzing the dosimetry in the radiotherapy planning software Eclipse. A 52-year-old female patient received a kidney transplant in 2002 and was diagnosed 11 years later with a cT3 N0 M0 squamous cell carcinoma of the anal canal. She was offered radical radiation therapy with 45 Gy in 25 fractions using a volumetric modulated arc therapy plan to the pelvic lymph nodes and tumor followed by a 9-Gy boost to the anal tumor alone using a three-dimensional conformal radiation therapy plan with concurrent 5-fluorouracil/mitomycin chemotherapy for a total dose of 54 Gy. The right external iliac and inguinal lymph nodes coverage was compromised to decrease the solitary pelvic kidney dose in addition to creating a 1-cm planning risk volume around the kidney and using half-beam blocks. Her pelvic kidney only received a mean dose of 6.68 Gy. Eight years later, the patient continues to be cancer-free, as evident with a recent sigmoidoscopy in 2021 and a physical examination in 2022. Her creatinine started to rise one year post-treatment, but age of the transplanted kidney is likely the cause of kidney failure.

When Radiation Therapy Becomes a Foe: A Rare Case of Radiation-Induced Angiosarcoma of Head and Neck.

Angiosarcomas are a rare subtype of sarcomas originating from vascular endothelial cells. Though frequently found in the head and neck area, there are minimal reports of radiation-induced angiosarcomas in this area. They have a poor prognosis due to a high rate of lymph node metastasis and, hence, require to be addressed promptly in order to improve survival. We present a rare case of radiation-induced angiosarcoma in a patient previously irradiated for squamous cell carcinoma of the neck. Due to variable and complex patient presentations of the disease, this case will help raise awareness of an uncommon complication of a common treatment offered to patients.

Perihippocampal Meningeal Carcinomatosis Following Hippocampal Avoidance Prophylactic Cranial Irradiation in Small Cell Lung Cancer: A Case Report.

Prophylactic cranial irradiation (PCI) for limited disease small cell lung cancer is the standard of care for curative treatment of this disease. However, neurocognitive dysfunction is one of the late adverse events of PCI and is often problematic. Recently, hippocampal avoidance prophylactic cranial irradiation (HA-PCI) is sometimes performed to prevent neurocognitive dysfunction after PCI. In HA-PCI, the question is whether or not metastases appear around the hippocampus that were not irradiated. We have experienced a case of perihippocampal meningeal carcinomatosis after HA-PCI. We also draw attention to the potential risks of performing HA-PCI based on this experience.

A Four-Year-Old Female With a Rare P53 Gene Mutation Diagnosed With Li-Fraumeni Syndrome and Concomitant Metastatic Rhabdomyosarcoma: A Case Report.

Li-Fraumeni syndrome (LFS) is an autosomal dominant disorder that often results from mutations that impair the functions of the tumor suppressor gene p53. LFS is categorized as a hereditary cancer predisposition syndrome in which patients frequently suffer from an elevated degree of onset and incidence of neoplastic malignancies. Among the different pathogenic variants of LFS, TP53 is one of the most frequently encountered ones. A four-year-old female is reported in this vignette, with a rare c.375+1G>T pathogenic variant in the TP53 gene consistent with an LFS diagnosis. To our knowledge, this is the first reported "germline" example of this variant in the literature. Initially, the patient presented to the emergency department due to concerns of progressive swelling and firmness of a mass in the patient's right abdomen. Further imaging and analysis revealed a rhabdomyosarcoma of the pelvis secondary to LFS. In addition to this, the patient's brother and mother both were positive for the same LFS mutation allowing us to make a definitive LFS diagnosis. Our patient then underwent neoadjuvant chemotherapy, radiotherapy, and eventually a resection of the main neoplastic lesion. Among pediatric LFS patients, the risk of suffering secondary and/or multiple cancers is pathologically elevated. That said, it is crucial to perform genetic analysis tests for pediatric oncology patients, especially those patients with hereditary predisposition to cancers. Considering the poor prognosis of most TP53 mutations, it is of utmost importance to implement prompt and systematic care for patients diagnosed with LFS.

Acute Gastrointestinal Bleeding: A Report of Rare Presentation of Duodenal Metastasis From Cervical Squamous Cell Carcinoma.

We report a case of a 42-year-old gravida 3, para 4 woman from Puerto Rico with a history of cervical cancer who presented with dizziness, lethargy, and three days of bright red blood per rectum. Imaging evaluation showed a retroperitoneal lymph node mass with secondary metastasis to the duodenum. After she was stabilized with multiple blood transfusions and to mitigate her ongoing bleeding, she was transferred to a tertiary care hospital for possible embolization by interventional radiologists. However, she was deemed a poor candidate for an interventional procedure and decided to ultimately go home on hospice care. This case highlights the rarity of duodenal metastasis presenting as gastrointestinal bleeding due to cervical squamous cell cancer and further reinforces the need for human papillomavirus vaccination and cervical cancer screening. This case study also illustrates that even though cervical cancer rates are low in the United States, it is still deadly in many countries across the globe. As people continue to travel and migrate across borders, the risk of being lost to follow-up is on the rise.