Fibro-Osseous Pseudotumor of the Digit Presenting as an Enlarging Erythematous Subungual Nodule

[Fibro-osseous Pseudotumor of the Digits - a Chameleon among generally rare Hand Tumors]

Der fibro-ossäre Pseudotumor der Finger (FOPD = fibro-osseous pseudotumor of the digits) ist unter den Handtumoren insgesamt als auch unter den benignen Handtumoren eine seltene Entität. FOPD können sowohl klinisch als auch radiologisch eine maligne Neoplasie nachahmen. Hauptsächlich tritt dieser Tumor bei jüngeren Erwachsenen, vorwiegend Frauen, auf. Bis dato ist eine maligne Transformation nicht beschrieben. Allerdings führen klinische und histologische Befunde fälschlicherweise immer wieder zur Diagnose eines bösartigen Tumors.

Fibro-Osseous Pseudotumor Arising From Nail Bed of the Great Toe: A Rare Case of Recurrence

A fibro-osseous pseudotumor (FOPT) is a rare, rapidly enlarging, benign soft-tissue neoplasm that presents with localized pain, swelling, and redness. It typically presents in the hands and much less frequently in the feet. FOPT is characterized histologically by foci of osseous differentiation within the proliferated fibroblasts. This must be differentiated from other benign and malignant lesions. FOPT of the toes has been described in a few reports, but recurrence, following surgical excision, is extremely rare. Here we report a young, healthy female patient who presented with a rapidly growing FOPT of the left great toe. This unusual case had recurred twice following surgical excision, all within a 2-month period of time. The lesion was again completely excised, with no recurrences at follow-ups of 18 and 36 months. In conclusion, FOPT is a rare soft tissue lesion of the toes. It features fibroblastic proliferation and osseous differentiation, which needs to be differentiated from other benign and malignant tumors. The standard treatment is complete surgical excision with an excellent prognosis.

Fibro-Osseous Pseudotumor

Fibro-osseous pseudotumor is an extremely rare subcutaneous benign ossifying lesion associated with bone formation that is most commonly seen in the hands, followed by the toes. Because the tumor has a certain degree of invasiveness, it is often mistaken for malignancy, which leads to radical, excessive treatment. Our case involved a 32-year-old man with lesions on the left index finger. We documented the detailed data of diagnosis, treatment, and follow-up. We also conducted a review and summarized the published cases to advance our understanding of the disease, provide more accurate diagnostic criteria, and avoid inappropriate surgical procedures. [Orthopedics. 2021;44(6):e713-e718.].

Benign growing mass of the digit presenting as an ulcerated mass - case report and review of the literature

A 68 year-old female presents with an ulcerated mass of the 5th digit, with rapid growth during the previous month to surgery. The mass was excised and covered with a 4th dorsal metacarpal artery perforator flap. The histologic analysis was compatible with the diagnosis of fibro-osseous pseudotumor of the digit.