C1 (ανεπαρκές)

Το ιδανικό ποσοστό των ανεπαρκών C1 πρέπει να είναι χαμηλότερο από 25%.

Στις περιπτώσεις που το εργαστήριο ξεπερνά το 20% η τεχνική της FNA πρέπει να επανεξετάζεται.

Αίτια που μπορεί να οδηγήσουν στον χαρακτηρισμό ενός επιχρίσματος ως ανεπαρκές ׃

• Λάθη κατά την λήψη
• Κακή επίστρωση
• Κακή μονιμοποίηση (μονιμοποιητικό μέσο που έχει λήξει, καθυστερημένη μονιμοποίηση)
• Ανεπαρκές στέγνωμα
• Κακήχρώση
• Μικρόςαριθμόςκυττάρων

Errors in sampling: Sometimes diagnostic information may be present in the sample and may be included in the report. For example adipose tissue fragments could be consistent with a clinical diagnosis of lipoma. Aspirates from some lesions, (cysts, abscesses, fat necrosis and nipple discharge specimens) might not contain epithelial cells but should not be classified as inadequate.

Bad spreading: Crush artefact, when too much pressure is used during smearing or when smears are too thick when not enough pressure is applied.

Poor fixation: (expired fixatives, fixation not immediate) Inadequate drying: when the material for air-drying dries too slowly or when the wet fixed, dries out before fixation

Bad staining (under/over)

6. Poor cellularity Remember that smears from some malignant lesions may contain only few atypical elements because of the desmoplastic reaction such as that found in some lobular carcinomas. It is always important to keep in mind that any case with few atypical elements should not be considered as inadequate

6. Poor cellularity Remember that smears from some malignant lesions may contain only few atypical elements because of the desmoplastic reaction such as that found in some lobular carcinomas. It is always important to keep in mind that any case with few atypical elements should not be considered as inadequate