We describe a 35-year old patient with nodular fasciitis, erythema migrans, and gonarthritis four months after a bite of a Borrelia afzelii infected tick. The Borrelia afzelii infection was identified by a polymerase chain reaction and direct sequencing of the amplification product. Borrelia-specific DNA was also detectable in nodular fasciitis tissue. We therefore conclude that Borrelia afzelii can be a causative agent of nodular fasciitis and Lyme arthritis in a highly endemic region of Northern Germany.
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Cureus
December 2024
Otolaryngology-Head and Neck Surgery, Kagawa University, Takamatsu, JPN.
Primary nodular fasciitis of the nasal cavity is quite rare, and only a few cases have been reported. The patient was a 40-year-old man whose chief complaint was a nasal tumor. We suspected fibrosarcoma and operated.
View Article and Find Full Text PDFJ Dermatol
December 2024
Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Int J Surg Pathol
December 2024
Breast Department, KK Women's and Children's Hospital, Singapore.
Fibromatosis-like metaplastic carcinoma (FLMC) is a rare subtype of metaplastic carcinoma of the breast. Diagnosing this entity poses significant challenges, particularly in core biopsies due to limited sampling and overlap with benign spindle cell lesions such as nodular fasciitis and fibromatosis. We present an example of FLMC in an asymptomatic middle-aged woman.
View Article and Find Full Text PDFInt J Surg Pathol
December 2024
Department of Orthopedics, Osaka General Medical Center, Osaka, Japan.
Nodular fasciitis is a benign, usually self-limiting myofibroblastic proliferation with a predilection for the upper extremities, trunk, and head and neck, and almost all of which harbor the fusion. Since nodular fasciitis is not widely recognized to arise within the joints, it may therefore cause diagnostic confusion in this uncommon setting. We report an unusual tumor of an 11-year-old patient who presented with a 6-month history of right elbow swelling and pain.
View Article and Find Full Text PDFGenes Chromosomes Cancer
November 2024
Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.
With the expanding possibilities of human genome research in recent years, the number of cases of soft tissue tumors that we are able to classify into the correct subgroups and to reveal their molecular profile is increasing. Among such tumors, we can also consider neoplasms that have a specific fusion of genes, in our case namely the pleomorphic adenoma gene 1 (PLAG1) and its partner. PLAG1 gene fusions were previously associated mainly with salivary gland pleomorphic adenomas, lipoblastomas, myoepithelial tumors, uterine epitheloid, myxoid leiomyosarcomas, and, recently, with PLAG1-rearranged fibromyxoid soft tissue tumors.
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