Subcutaneous sarcoidosis without systemic involvement.

Subcutaneous sarcoidosis is a rare variant of cutaneous sarcoidosis, which typically presents as single or multiple, indurated, ill-defined plaques, typically on the upper extremities. Granulomas consisting of macrophages with multinucleated giant cells and sparse lymphocytic inflammation are confined to the subcutaneous tissue, rather than to their usual location within the dermis in typical lesions of cutaneous sarcoidosis. An association between subcutaneous sarcoidosis and systemic involvement has been reported, although response to treatment and prognosis remain good.

Is Tumor of Follicular Infundibulum a Reaction to Dermal Scarring?

Tumor of follicular infundibulum (TFI) is currently believed to be a benign epithelial neoplasm with follicular differentiation. It has been suggested that TFI is associated with dermal scarring, but further investigation is needed to confirm this correlation. To approach this question, a retrospective study was presented, a total of 67 cases (64 lesions) were found in a search covering cases over a 10-year period.

Morphological diversity of trichodiscomas and fibrofolliculomas.

Trichodiscomas (TDs) and fibrofolliculomas (FFs) are hamartomatous tumors, which are usually small facial papules; they are frequently a disease marker for Birt-Hogg-Dubé syndrome, their recognition is important because of this association. Some believe that TD and FF is the same lesion, others have proposed the term "mantleoma" to include the morphological continuum of both of these lesions. Recently, some variants (eg, spindle cell TD, TD with lipomatous metaplasia) have been described.

Poorly differentiated carcinoma arising in the setting of erythema ab igne.

Erythema ab igne (EAI) is a reticulated, erythematous, or hyperpigmented dermatosis that is caused by chronic exposure to infrared radiation. Chronic lesions of EAI have significant potential for malignant transformation. We report a case of poorly differentiated carcinoma arising within a patch of long-standing EAI on the lower extremity of a 92-year-old female.

Epidermolytic hyperkeratosis and congenital platelike osteoma cutis in a child.

Epidermolytic hyperkeratosis is a rare congenital ichthyosis. Platelike osteoma cutis also is a rare diagnosis and is associated with abnormal ossification of cutaneous or subcutaneous tissue. A 17-month-old Hispanic girl presented with a plate of subcutaneous bone since birth as well as considerable scaling and hyperkeratosis centered around the joints.

Fine needle aspiration findings in malignant ameloblastoma: a case report and differential diagnosis.

We present a case of malignant ameloblastoma presenting in the posterior mandible and cervical lymph nodes of an African American child. This case is somewhat unusual in that the patient was an adolescent and presented with metastatic disease. This partly clinical as well as cytologic diagnosis was facilitated by the presence of typical ameloblastoma cytology in multiple cervical lymph nodes adjacent to the histologically confirmed intraosseous ameloblastoma.

Imprint cytology of high-grade immature ovarian teratoma: a case report, literature review, and distinction from other ovarian small round cell tumors.

Immature ovarian teratoma (IOT) is a rare and aggressive malignant neoplasm characterized by immature neural tissue. The cytomorphologic features have only rarely been described. We herein describe an additional case and review the literature regarding this entity.