SB 5181 Lipoma arborescens

Diagnostic Tally: Lipoma arborescens--unanimous

SB 5182 Esophageal melanosis

Diagnostic Tally: Esophageal melanosis—15, hemosiderosis—5, medication rxn—5.

Additional studies: HMB-45 (+), S-100 (+). Iron (-). Melanin (+).

Reference: Arch Pathol Lab Med 2006; 130(4): 552-557.

SB 5183 Gastric leiomyoma

Diagnostic tally: GIST—15, leiomyoma—20, adenomatoid tumor—1, perineurioma—1.

Additional studies: desmin (+), actin (+), CD117 (-), S100 (-), CD34 (-).

SB 5184 Eosinophilic mastitis

Diagnostic Tally: Kimura’s disease—2, eosinophilic mastitis—30.

Reference: Ann Surg 2003; 69: 620-623.

SB 5185 Gynecomastia-like lesion of female breast

Diagnostic Tally: Fibromatosis—2, gynecomastia—20, PASH—5.

SB 5186 Steroid cell tumor

Diagnostic tally: Steroid cell tumor—30, metastatic RCC--1, adrenal rest—1.

SB 5187 Multiple organ dysfunction syndrome, Streptococcus A sepsis, ecthyma.

Diagnostic Tally: Acute GN—10, meningococcemia/DIC—3, heroin overdose—2.

SB 5188 Micronodular thymoma with lymphoid stroma

Diagnostic Tally: Neuroendocrine carcinoma—5, thymoma—10.

IPOX: CK7(+), CD99(+). Chromogranin, synaptophysin, TTF-1, CD1a, CK20 (all negative).

SB 5189 Sarcomatoid renal cell carcinoma with osteosarcomatous differentiation

Diagnostic Tally: Carcinosarcoma-15, renal cell carcinoma with osseous metaplasia-5,

mixed epithelial stromal tumor—2, mixed mesenchymal tumor—1.

SB 5190 Merkel cell carcinoma with ganglioneuroblastic differentiation (?)

Diagnostic Tally: Merkel cell carcinoma—3, Merkel cell carcinoma with neuroblastic

features—15, desmoplastic small round cell tumor—2.

IPOX: CK20(+), CD99(+), synaptophysin (+), S-100 (-).

Consultation: Merkel cell carcinoma—Stanford.