Cytogenetic and cytologic features of chondroid lipoma of soft tissue

The cytologic and cytogenetic findings of chondroid lipoma, a rare benign tumor of soft tissue, have not been described. This report details the morphologic features of a fine-needle aspiration biopsy specimen and describes a novel cytogenetic finding. The main cytologic features consisted of clustered, variably mature, multivacuolated, hibernoma-like cells enmeshed in a capillary plexus, with a background of chondromyxoid material. Cytogenetic analysis revealed a balanced translocation t (11, 16)(q13;p12-13) distinct from the known translocation involving 16p11 in myxoid and round-cell liposarcoma. The 11q13 breakpoint was previously noted in hibernomas, raising the possibility of a common genetic deregulation.

Solitary fibrous tumor of urinary bladder: report of two cases

The clinical and pathologic features of two cases of solitary fibrous tumor arising from urinary bladder wall are described. To our knowledge, solitary fibrous tumors have not been previously reported at this site. Both tumors showed typical histologic features of solitary fibrous tumor, were CD34 immunostain positive and pursued a benign clinical course on short term follow-up.

Solitary fibrous tumour: clinicopathological, immunohistochemical, and ultrastructural analysis of 12 cases arising in soft tissues, nasal cavity and nasopharynx, urinary bladder and prostate

The clinicopathological features of 12 extraserosal solitary fibrous tumours (SFT) are described. The age of the patients ranged from 18 to 72 years (mean: 48.2 years; median: 54 years); 5 were female patients. Seven lesions arose in soft tissue (5 in perifascial, and 1 each in subcutaneous and intramuscular tissues). They were situated in the groin (2 cases) and the neck, right buttock, left scapula, upper arm, and anterior abdominal wall (1 case each). One polypoid lesion was seen in in the nasal cavity and 1 in the nasopharynx; 2 neoplasms arose in the urinary bladder and 1 was located in the prostate and periprostatic tissue. Nine lesions were excised; in 1 patient wide excision was performed and in 2 patients, transurethral resection. Limited follow-up of 3 cases revealed a benign clinical course. The size of the neoplasms ranged from 1.7 cm to 20.0 cm (mean: 5.4 cm; median: 3.5 cm). Histologically, the neoplasms were well circumscribed and composed of cytologically bland spindle cells arranged without an obvious pattern; focally storiform or fascicular growth patterns were seen. Tumour cells were separated by thick bands of collagen demonstrating foci of keloid-like hyalinization. Prominent vascularity showing a haemangiopericytoma-like vascular pattern and vessels with thick, hyalinized vessel walls were seen in all cases. Increased mitotic activity was noted in 2 soft tissue cases (4-6 mitoses in 10 high-power fields); the other cases showed fewer than 2 mitotic figures in 10 highpower fields. Immunohistochemically, all cases tested stained positively for vimentin, CD34 and CD99, and 2 cases showed focal myofibroblastic differentiation. Two cases examined ultrastructurally showed a fibroblastic phenotype; focally pinocytic vesicles and microfilaments were identified. SFT represents a distinct neoplasm that should be included in the differential diagnosis of spindle-cell neoplasms in soft tissue, nasal cavity and nasopharynx, urinary bladder, and prostate. Strict diagnostic criteria are necessary to avoid overdiagnosis or confusion with more aggressive neoplasms in these locations.

Nodular fasciitis of the vulva: a study of six cases and literature review

We report six cases of histologically typical nodular fasciitis that each presented as a vulvar soft tissue mass. The diagnosis of nodular fasciitis had not been considered by the referring pathologist in any of the five consultation cases. The patient's ages ranged from 7 to 51 years (mean 34). The lesion was confined to the labia in the four cases in which a specific site was noted. The masses ranged from 1.5 to 3.5 cm (mean 2.2) in maximal dimension. All of them were locally excised, and the resection margins were involved in each case. In addition to the typical features of nodular fasciitis, a noteworthy finding in two of the six cases was the presence of cleftlike spaces lined by plump synovial-like cells. Follow-up ranged from 3 months to 7 years (mean 24 months). A local recurrence developed in one patient at 4 months and was reexcised; there have been no recurrences in any other case. The literature contains only five additional examples of vulvar nodular fasciitis. Although all were pathologically typical, the diagnosis was often not considered, evidently because of the unusual location. Awareness that nodular fasciitis may occur in the vulva and the features that allow its distinction from other mesenchymal "tumors" occurring at this site will facilitate its correct diagnosis.

Tumour of a peripheral nerve sheath with invasion of the lumbar spine

Tumours of peripheral nerve sheaths are rarely malignant, and even when malignant they are only infrequently associated with extensive destruction of bone. The authors report the computed tomography and magnetic resonance imaging findings for an unusually large sheath tumour that presented with extensive destruction in the lumbar spine.

Waxing and waning hyperinflation in congenital cystic adenomatoid malformation of the lung

This report describes a newborn with respiratory distress, waxing and waning left lung hyperinflation, and pulmonary hemorrhage. This atypical presentation of congenital cystic adenomatoid malformation of the lung has not been previously reported, posed a major diagnostic problem, and delayed potentially lifesaving surgery.