Hiding in the Folds: Case Report Highlighting the Role of Imaging in Detecting Dermatofibrosarcoma Protuberans.

Dermatofibrosarcoma protuberans (DFSP) is a rare slow-growing skin cancer with a great capacity for local destruction. DFSP can manifest in a myriad of ways. This case report aims to contribute to the literature by increasing awareness of this condition, along with common diagnostic practices and treatment regimens.

Fungating mass on the breast of a male patient.

Breast cancer is one of the most common malignancies that can lead to cutaneous metastasis. Dermatopathologists often play an important role in the diagnosis of breast cancer metastasis to the skin. Rarely, dermatopathologists render a histopathologic diagnosis of primary breast cancer.

Hyperphosphatemic Familial Tumoral Calcinosis.

Hyperphosphatemic familial tumoral calcinosis (HFTC) is a rare, autosomal recessive condition characterized by fibroblast growth factor 23 signaling pathway dysregulation, hyperphosphatemia and ectopic calcifications (which manifest as joint motion limitations), inflammatory bony pain, and disability. Given the rarity and multiorgan involvement of HFTC, a multidisciplinary approach including Dermatology, Ophthalmology, Dentistry, Nephrology, Endocrinology, Rheumatology, and Genetics is necessary for diagnosis and treatment. We present a multidisciplinary diagnostic and treatment approach for a patient with HFTC due to a gene mutation with unique imaging highlighting the extent of calcinosis seen in HFTC.

The Spectrum of Cutaneous Granulomatous Inflammation and Detection of Rubella Virus in Skin Biopsies of Patients With Common Variable Immune Deficiency.

Background: There is a known association between common variable immunodeficiency (CVID) and granulomas in multiple organ systems, including the skin, lung, liver, and spleen. Rubella virus has also been detected within cutaneous granulomas in both immunocompetent and immunocompromised hosts. We present a retrospective case series of patients with CVID and granulomatous skin disease and describe the spectrum of clinical and histopathologic features, including the status of rubella virus in the cutaneous granulomas.

Cutaneous Collagenous Vasculopathy: A Retrospective Clinical and Histopathologic Analysis of 34 Cases.

Background: Cutaneous collagenous vasculopathy (CCV) is a rare acquired microangiopathy that commonly affects middle-aged, fair-skinned individuals. It presents with telangiectatic lesions involving the lower extremities. Histologic analysis is mandatory for diagnosis.

ASTCT and USCLC Clinical Practice Recommendations for Allogeneic Stem Cell Transplant in Mycosis Fungoides and Sézary Syndrome.

Mycosis fungoides (MF) and Sézary syndrome (SS) are the most common subtypes of cutaneous T-cell lymphoma (CTCL). While MF generally follows an indolent course, a subset of patients will experience progressive and/or treatment-refractory disease; Sézary syndrome is an aggressive lymphoma associated with high morbidity and mortality. Although allogeneic hematopoietic cell transplant (allo-HCT) is the only currently available potentially curative treatment modality for MF/SS there is no published guidance on referral criteria, transplant timing orallo-HCT approach.

Myelodysplasia cutis and VEXAS syndrome initially diagnosed as histiocytoid Sweet syndrome: A diagnostic pitfall.

Histiocytoid Sweet syndrome (H-SS) is a histopathological variant of Sweet syndrome (SS) defined by cutaneous infiltration of immature myeloid cells morphologically resembling histiocytes. The association of H-SS with underlying malignancy, particularly myelodysplastic syndromes, is well-established. Myelodysplasia cutis (MDS-cutis) has been proposed to describe cases historically diagnosed as H-SS but characterized by shared clonality of the myeloid infiltrate in skin and bone marrow.

Toxic epidermal necrolysis-like cutaneous toxicity following chimeric antigen receptor T-cell therapy in recurrent large B-cell lymphoma.

Chimeric antigen receptor (CAR) T-cell therapy has demonstrated remarkable success in treating various B-cell malignancies, redirecting T-cell cytotoxicity toward cancer cells. Despite its efficacy, CAR-T therapy is associated with potential risks, including cytokine release syndrome (CRS) and cytopenia. We present a case of a 69-year-old man with diffuse large B-cell lymphoma treated with axicabtagene-ciloleucel CAR-T therapy, who developed a rare and severe cutaneous toxicity resembling toxic epidermal necrolysis (TEN).

Standardized Protocols for Clinical and Histopathological Characterization of Hidradenitis Suppurativa Tissue Specimens.

Methods for describing and reporting the clinical and histologic characteristics of cutaneous tissue samples from patients with hidradenitis suppurativa (HS) are not currently standardized, limiting clinicians' and scientists' ability to uniformly record, report, and communicate about the characteristics of tissue used in translational experiments. A recently published consensus statement outlined morphological definitions of typical HS lesions, but no consensus has been reached regarding clinical characterization and examination of HS tissue samples. In this study, we aimed to establish a protocol for reporting histopathologic and clinical characteristics of HS tissue specimens.

A case of diagnostic uncertainty: High-grade melanocytoma versus balloon cell melanoma in a pediatric patient.

An 11-year-old female was referred from an outside institution after a diagnostic biopsy and subsequent excision of a progressively enlarging reddish-brown nodule demonstrated features concerning for a balloon cell nevus with severe atypia versus a high-grade melanocytoma. Upon review of the initial biopsy specimen and molecular data, we favored the diagnosis to be consistent with a high-grade melanocytoma with balloon cell changes while considering the possibility of balloon cell melanoma due to concerning histopathologic and genetic abnormalities. In this case study, we discuss critical diagnostic considerations in this rare pediatric case and highlight important pathologic and clinical features of melanocytomas and balloon cell melanoma.

Digital dermatopathology implementation: Experience at a multisite academic institution.

Background: Technology has revolutionized not only direct patient care but also diagnostic care processes. This study evaluates the transition from glass-slide microscopy to digital pathology (DP) at a multisite academic institution, using mixed methods to understand user perceptions of digitization and key productivity metrics of practice change.

Methods: Participants included dermatopathologists, pathology reporting specialists, and clinicians.

Systemic correlates of cutaneous manifestations of lupus erythematosus.

Background: We aimed to investigate the prevalence of skin disease among patients with systemic lupus erythematosus (SLE) and determine whether LE skin disease had clinical or serologic correlates with SLE.

Methods: We reviewed records of 335 patients with SLE (seen at Mayo Clinic, Rochester, Minnesota, USA) and abstracted skin manifestations, fulfilled mucocutaneous SLE criteria, and clinical and serologic parameters.

Results: Of the 231 patients with skin manifestations, 57 (24.

Plexiform neurofibroma masquerading as a giant congenital melanocytic nevus.

A 4-month-old male presented for a large, hypertrichotic brown patch on the upper back with several scattered 0.5-1.5 cm, round to oval, brown macules and patches on the trunk and extremities.